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Thread: New - Cambo Actus View Camera for Sony A7

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    Senior Member Steve Hendrix's Avatar
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    New - Cambo Actus View Camera for Sony A7

    **Cross posted on LL.

    This is a pre-release of a Cambo announcement of a new small format view camera system for mirrorless camera systems like the Sony A7.

    This is a pretty exciting looking extension for these cameras.

    https://captureintegration.com/cambo-actus-view-camera/

    Similar to the Cambo X2 Pro, but the camera is the size of an iPhone, yet will have precisely geared movements made for such a small camera.

    15cm x 10cm x 17cm, approximately 1000 grams. Pricing is expected to be in the $2,000 range.

    *Note - there are a some elements not 100% finalized, but the final shipping version will be delivered relatively quickly, probably within 1-2 months for orders today.


    Steve Hendrix
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    Re: New - Cambo Actus View Camera for Sony A7

    Steve, looking at the specs it seems that the lensplate will work on Phase/Mamiya 645 lenses. Is that correct? So we order one configured in say Sony and the lensplate in Mamiya that way we can use the 7 or 7R with existing 645 lenses. What am I missing? Any idea if they are considering using lenses from the WRS? - Guess that would work well ......
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    Re: New - Cambo Actus View Camera for Sony A7

    This is greeeeeeaaaatttt (as Tommy the Tiger would say) - allowing users to access the wonderful world of R/S and S/K lenses (combined with precision movements) without the expense of a digital back - and all for less than the cost of an Alpa lens mount. Bravo, Cambo.

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    Re: New - Cambo Actus View Camera for Sony A7

    Now that does look interesting!

    Would love to know how the A7R works with SK and RS lenses when used with one of these and the sort of movements available.

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    Re: New - Cambo Actus View Camera for Sony A7

    I WANT IT> STEVE PUT MY ORDER IN
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

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    Re: New - Cambo Actus View Camera for Sony A7

    I'm already thinking how well this will work shooting IR!
    Don Libby
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    Senior Member Steve Hendrix's Avatar
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Don Libby View Post
    Steve, looking at the specs it seems that the lensplate will work on Phase/Mamiya 645 lenses. Is that correct? So we order one configured in say Sony and the lensplate in Mamiya that way we can use the 7 or 7R with existing 645 lenses. What am I missing? Any idea if they are considering using lenses from the WRS? - Guess that would work well ......

    You're on the right track Don. Very similar to X2 Pro, but form factor much improved for smaller bodies, likely greater precision as well. Lens boards will be ordered separately.


    Steve Hendrix
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by gazwas View Post
    Now that does look interesting!

    Would love to know how the A7R works with SK and RS lenses when used with one of these and the sort of movements available.

    Yes, the performance itself with shifts, etc, will be quite interesting.


    Steve Hendrix
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Steve Hendrix View Post
    Yes, the performance itself with shifts, etc, will be quite interesting.
    So will you be getting a pre-production model to play with to tease us some more?

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    Re: New - Cambo Actus View Camera for Sony A7

    I know that Chris Barrett reported using the S/K 35mm with the A7 on an A/S ML-2 (probably unshifted), so I'd imagine the same deal here.

    For shifts with W/A lenses I'd imagine you'd need to go with the R/S wides* as these have the longer flange-sensor distance. Not sure how much the recessed nature of the sensor in the A7 is going to vignette the effects of shifting though - time (and testing) will tell.

    Jim

    *With no outrageously expensive helical and lens mount to buy, this isn't as much of an eye-watering proposition as it used to be.
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    Re: New - Cambo Actus View Camera for Sony A7

    That looks really cool, might even be worth buying an a7r for!

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    Senior Member Steve Hendrix's Avatar
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by gazwas View Post
    So will you be getting a pre-production model to play with to tease us some more?

    As soon as we can, although they are close enough to final production that our first unit will probably be a final.


    Steve Hendrix
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    Re: New - Cambo Actus View Camera for Sony A7

    Steve help me out here... about the lenses. Will/would I be able to take a lens from my 645 bag and simply attach it to the lensboard to use or must I have a permanent mounted lenses specific to the system. I tried to answer this myself by looking and the DSRL system and I'm still scratching my head. The perfect (for me) system is to attach the 7r to one end and grab a lens from the bag and attached it to the front thus giving me the freedom of using the lens on both the Sony and DF systems. Make sense?
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    Re: New - Cambo Actus View Camera for Sony A7

    As you might be able to tell - I'm highly interested in this esp shooing my newly IR converted 7R.
    Don Libby
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Guy Mancuso View Post
    I WANT IT> STEVE PUT MY ORDER IN
    Purchasing on impulse? The hill only goes down from there...
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    Re: New - Cambo Actus View Camera for Sony A7

    I'm a gear slut whore. You expect anything less. Lol

    Actually it just be my poor mans tech cam. I'm all in
    Photography is all about experimentation and without it you will never learn art.

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    Re: New - Cambo Actus View Camera for Sony A7

    If you use modern Phase or Mamiya 645 glass how will you adjust the shutter? All of these are like the Nikon G lenses no manual aperture ring. The 645 lenses will be wide open all the time unless there is some electronic or manual linkage for the shutter.

    All lenses shown in example have manual shutters. And the Schneider or Rodenstocks would use the Copal shutter I guess. Also assuming SK or ROD lenses will only work in Cambo mounts.

    Paul

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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Paul2660 View Post
    If you use modern Phase or Mamiya 645 glass how will you adjust the shutter? All of these are like the Nikon G lenses no manual aperture ring. The 645 lenses will be wide open all the time unless there is some electronic or manual linkage for the shutter.

    All lenses shown in example have manual shutters. And the Schneider or Rodenstocks would use the Copal shutter I guess. Also assuming SK or ROD lenses will only work in Cambo mounts.

    Paul

    Right - lenses need a manual aperture ring, or else you'll have to trick it into the aperture you want to use (mount it on the native camera, take a shot at the aperture you want, press Depth of Field Preview button, shut camera down). But that's not very practical, so use an older lens.

    The Rodenstock HR and Schneider Digitar lenses can be mounted in the Cambo board for the camera (very affordable, usually less than $100) - they don't need to be mounted in the Cambo Helical LensPanels.


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    Re: New - Cambo Actus View Camera for Sony A7

    The Rodenstock HR and Schneider Digitar lenses can be mounted in the Cambo board for the camera (very affordable, usually less than $100) - they don't need to be mounted in the Cambo Helical LensPanels.


    Thats what Im after is real tech lenses
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    Re: New - Cambo Actus View Camera for Sony A7

    Okay, looks like I'll need separate lenses for this to work for me....
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    Re: New - Cambo Actus View Camera for Sony A7

    I just had a good laugh....because in the whole thread nobody even slightly mentions about this not being medium format nor a digital back ?

    I also think it is OK and I am glad this is normal now, but do you remember what kind of discussions were going on here when the D800/E arrived ?

    Welcome to the new world of Digital fusions.....

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    Re: New - Cambo Actus View Camera for Sony A7

    Interesting that a helical mount "is not required." Is the focus mechanism much more fine than an Arca Swiss ML2?

    Foster

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    Re: New - Cambo Actus View Camera for Sony A7

    This is the coolest device I've seen in a long time. It also helps making the A7 family of cameras one of the most, maybe the most, versatile camera systems ever made, in spite of an almost total lack of native lenses. I might have to revise my shopping plans.
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    Re: New - Cambo Actus View Camera for Sony A7

    I bought an digiback for the movements the cameras will give me.
    Medium format is all about movements for me.

    If this cambo works well, my alpa and digiback will be for sale soon.

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    Re: New - Cambo Actus View Camera for Sony A7

    The A7r had a few problems with adapted lenses. Adding shifts, swings, and tilts might prove more problematic. I assume the A7r has microlenses.

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    Re: New - Cambo Actus View Camera for Sony A7

    You are absolutely right. How could this work with the Sony sensor?
    Quote Originally Posted by Shashin View Post
    The A7r had a few problems with adapted lenses. Adding shifts, swings, and tilts might prove more problematic. I assume the A7r has microlenses.

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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Steve Hendrix View Post

    The Rodenstock HR and Schneider Digitar lenses can be mounted in the Cambo board for the camera (very affordable, usually less than $100) - they don't need to be mounted in the Cambo Helical LensPanels.
    So... rather than going off in search of more lenses, if I have a very decent Cambo WRS mounted lens that I want to use on this Actus, I'd have to remove the helical and then fit the copal and lens into the basic Cambo copal board?

    I don't have my WRS in front of me, how difficult is it to remove the helical? I've put lenses into copals and boards before, but never had to get it out of the helical.

    Pity Cambo aren't offering (or maybe they will later?!) a board where a WRS/WDS mounted lens can slot straight in - then I can pick between Actus or WRS body depending on the job and not have to worry about remounting my favourite lenses...


    First though, will have to wait to see how the A7R performs at the edge of the image circle...
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    Re: New - Cambo Actus View Camera for Sony A7

    Chris Barrett has already tested the A7r with an SK35 over at Lula (using the MF-two) and showed the result, it's there for anyone interested.

    The deal with these Sony sensors is this: they are extremely crosstalk prone, ie poor angular response. Due to the smaller pixel size the A7r is worse than the IQ250, and the IQ250 is not particularly good with the wides. I've attached an image that shows what crosstalk is if you don't know. It's light getting registered in the wrong color channel.

    Just like the IQ250 the A7r has offset pixel (in relation to microlenses, popularly called "microlens offset" but it's actually the pixels thet are offset) at the sides which is to handle wides better, but that is only when they are not shifted. So if you don't shift you can probably go quite wide.

    But when you start to shift you get immediate problems with the wides, due to the massive crosstalk you get color issues (in the best case just desaturation, but color shifts can occur too) and eventually demosaicing artifacts. Unlike regular color casts, a normal LCC algorithm such as the one available in C1 won't correct crosstalk.

    How much crosstalk artifacts you can accept is a matter of taste though, and I've noted that tech cam users have a tendency to care a lot about sharpness and not that much about color stability, so I guess many will be pleased with quite wide lenses.

    Also note that the result will vary greatly if you have the sensor in horizontal or vertical orientation when you shift, as crosstalk is a lot more in one direction (forgot which one it is with the A7r, with the IQ250 I think it's horizontal that's worse if I remember correctly)

    If you want to shift and don't want any crosstalk you'll need to use longer lenses than say 60mm, or use regular strongly retrofocus MF-SLR lenses. For wide angle tilt-shift photography with the A7r the Canon TS-E II lenses is still the way to go, and for the 30-50mm range I guess you could find some decent MF-SLR lenses. If you care about color tech cam wides will not be a good choice. At least not until someone comes up with a crosstalk cancellation algorithm that works with this large amounts of crosstalk (I might just do that... so please do buy into this system )
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    Re: New - Cambo Actus View Camera for Sony A7

    So, the real question is how wide will it go to support SK or RS lenses?

    Torger's point about crosstalk is relevant for colour fidelity but I'm sure that post processing could solve many of these issues albeit with the loss of some real data.

    I'd buy an A7R for this if it works with something reasonably wide.
    Remember: adventure before dementia!

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    Re: New - Cambo Actus View Camera for Sony A7

    Thanks for posting this Steve.

    My main interest would be for table-top product photography … hopefully using my trusty Rodenstock 90mm, and Schneider 120 Macro with Copel shutters previously used on a Rollie Xact-2. Objective being to gain more DOF front to back using the optimal f/stops for each.

    Selective focus portrait work is also a prime interest.

    I assume that this will work, right?

    - Marc

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    Re: New - Cambo Actus View Camera for Sony A7

    First to make one thing clear: crosstalk applies to normal to wide tech lenses (say 60mm and lower) in shifted positions. Table top photography with longer lenses will most likely work extremely well with this camera. But this camera looks like a portable field camera rather than a studio camera, which means that people will be interested in wide angle performance. For studio photography with longer lenses one is probably better off with a camera that has rear movements as well, such as the Rollei X-Act 2 which some users already use with the A7r (it costs twice as much though, $4K).

    Back to crosstalk;

    Capture One LCC algorithm does not correct crosstalk at all. It's a quite complicated thing to do. However for mild crosstalks you will only get mild color desaturation, so you can ignore it or make a radial saturation increase. For more heavy crosstalk the color will be so dead and/or shifted you cannot just increase saturation, and for severe crosstalk you start to get mazing artifacts in the demosaicing.

    Crosstalk with tech cam wides is nothing new. I actually have it even with my large pixel Aptus 75 when combined with the SK35 and shifts, and even with the new SK60XL at the edge of the image circle, so tech cams users have lived with it for long and been satisfied -- mild crosstalk is not too bad, and if the scene does not have very saturated colors you may not even see it. However with the Dalsa 6um sensors (P65+, IQ160) crosstalk became worse and in response SK35 became less popular and many upgraded to the (weak) retrofocus Rodie 32 for better performance with those new sensors.

    Then we have IQ180 which have even higher levels of crosstalk, and IQ250 worse than that, and then after that the A7r comes in. So there's a whole new level of crosstalk which we haven't seen before, and thus we haven't really had time to investigate how much post-processing can solve these issues. If we're lucky it can solve a lot.

    I just want to warn those that intend to buy into this system early that it may not perform well at all with tech wides, and new post-processing techniques may need to be developed before it will, and it's uncertain at this point how successful that will be.

    Back in the days there were many upgrades from P65+ to IQ180 without that the users have been informed about the increase in crosstalk and what effects that would have on the lenses they owned. A7r / Actus is coffee money in comparison of course, but still I hope people get information about this issue this time around, before they buy rather than after.

    A simple sanity check test to see if a lens/sensor combination has crosstalk is to shoot one normal white LCC and then one more LCC with a polyester color filter stuck inbetween, say a red Wratten 29 filter so you get a red LCC (other colors work too, but red is best for testing). Then you generate an LCC from the white one and apply to the red shot. If there is no crosstalk you should see a flat red surface with the same saturation over the whole surface. If there is crosstalk you will see desaturation in the red, and if there is heavy crosstalk you may see a color shift, even that red becomes green. Do test both horizontal and vertical orientation of the sensor as the result can differ greatly due to how pixels are wired on the sensor.

    The thing with crosstalk is that it will depend on what colors you have in the scene you are shooting what the result will be. If you have colors that are low in saturation the result will be better, as crosstalk will have a lesser effect on those colors. This means that a single scene shot may not give you the whole truth of how the system will perform in various conditions.
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by GrahamWelland View Post
    So, the real question is how wide will it go to support SK or RS lenses?

    Torger's point about crosstalk is relevant for colour fidelity but I'm sure that post processing could solve many of these issues albeit with the loss of some real data.

    I'd buy an A7R for this if it works with something reasonably wide.
    The image have showed the distance from Flange of Sony to infinity is 18mm.( Rodenstock 45mm 4.5)
    the lens that can be use with Sony A7 in this case have to have the distance from the lens end to infinity (d-e more than 18 mm.)
    From the Rodent lens description the HR Digaron-35mm is the shortest lens 53.5-29.2 = 24.3 when focus to infinity and will have the balance space for adjustment of 24.3-18 = 6.3mm



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    Re: New - Cambo Actus View Camera for Sony A7

    Thats where waiting and testing comes into play...
    However, whats a forum if you don't have to talk/guess/speculate about something.

    Quote Originally Posted by GrahamWelland View Post
    So, the real question is how wide will it go to support SK or RS lenses?

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    Re: New - Cambo Actus View Camera for Sony A7

    Marc,

    Those should work as long as they are Copal #0. They certainly can focus the same as they do on the Cambo X2 which I am a big fan of.

    I just wanted to add some excitement I have for this new product that my associate, Steve Hendrix has already outlined.

    Having many MF back customers using the Cambo X2, I became very interested in the support of Leica R lenses.

    We have used many Hasselblad V and Mamiya RZ lenses in the past with the Cambo X2, but the Leica R lenses are out there and available. Being able to use those in addition is a huge plus, once we know how this chip reacts to tilts and swings.

    I know when doing a lot of testing with Canon 5D Mark II and MF backs, the Schneider and Rodenstock digital lenses out performed the Hasselblad V and RZ lenses.

    Mamiya M645 lenses are also supported but not Mamiya/Phase One AF lenses due to the fact of not being able to control the shutter speed and aperture. I have even taken Sinar DB Digital lens like the 80mm and mounted it into Copal shutters and got fantastic results. So many lens options for devices like this one coming.

    Copal #0 shutter boards look like the largest being supported mainly because of the size of the footprint. And it would be slick if we could take a Cambo WDS lens mount and adapt that to this device for all our DS and RS customers.

    Stay tuned Capture Integration will have all those answers for you soon. Go Steveeee.


    Chris Snipes






    Quote Originally Posted by fotografz View Post
    Thanks for posting this Steve.

    My main interest would be for table-top product photography … hopefully using my trusty Rodenstock 90mm, and Schneider 120 Macro with Copel shutters previously used on a Rollie Xact-2. Objective being to gain more DOF front to back using the optimal f/stops for each.

    Selective focus portrait work is also a prime interest.

    I assume that this will work, right?

    - Marc
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    Re: New - Cambo Actus View Camera for Sony A7

    I also wondering if you do shift, with the Sony which I would want to do, will C1 process the LCC's. C1 seems to be very camera specific on LCC's and will not for example allow you to use a LCC from a IQ160 on a IQ260.

    I had wondered a few years ago, if I shot LCC's with my Canon 24 TS-E, would C1 see them and allow me to apply them to images taken with my 5d MKII. I was not then worried about color cast, as it's not an issue, but with the light fall off, which you still get. C1 does a very good job with light fall off in LCC processing.

    Question to Torger, Crosstalk.

    How much is crosstalk, vs, just light fall off. You can see for example with the SK35 when shifted past 8mm, a huge amount of color saturation fall off and detail smearing. This also happens with the SK43 past around 14mm on the 60MP backs. I have always assumed this was due to lens quality, at extreme edges of the image circle, but I guess some may also be due to crosstalk. There is a definite line with the SK's where you hit the wall and the image past that spot suffers too much. You also pick up the rippling which C1 sometimes can fix on a SK, but is hard on for example a pure blue sky. C1 does better with the Rod lenses with rippling. On the color/sat fall off, C1 does not fix this at all, but again I have assumed this was due to the image circle.

    Quesiton to Steve:

    I am assuming that the Rodenstock lenses will have to have a Cambo mount? Which would be cost prohibitive (at least to me) for folks using a system other than Cambo, i.e. Arca or Alpa.

    Paul

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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Paul2660 View Post
    Question to Torger, Crosstalk.

    How much is crosstalk, vs, just light fall off. You can see for example with the SK35 when shifted past 8mm, a huge amount of color saturation fall off and detail smearing. This also happens with the SK43 past around 14mm on the 60MP backs. I have always assumed this was due to lens quality, at extreme edges of the image circle, but I guess some may also be due to crosstalk. There is a definite line with the SK's where you hit the wall and the image past that spot suffers too much. You also pick up the rippling which C1 sometimes can fix on a SK, but is hard on for example a pure blue sky. C1 does better with the Rod lenses with rippling. On the color/sat fall off, C1 does not fix this at all, but again I have assumed this was due to the image circle.
    LCC shots is not only camera model specific, it's specific per specimen, each sensor has their own "fingerprint" and can very quite much chip to chip, at least the MF CCD chips, not sure about the Sony CMOS sensors, might be more uniform.

    Color saturation falloff is a pure crosstalk effect.

    Concerning smearing, crosstalk does not actually cause that much smearing as it's only say 20% of the light that travels to the next pixel and much less to the next past that which affects color but not detail very much. Smearing at the edge of the image circle is much more than that, so that's a lens sharpness issue. However when you see mazing, ie strange micropatterns when you zoom in to 100%, you see a crosstalk effect - the demosaicer gets confused when red leaks into green1 and blue to green2 thus separating the two greens, this cause mazing. Should be said that C1's demosaicer is one of the more robust demosaicers so you need pretty heavy crosstalk before it starts to produce mazing.

    If you use the center filter on the SK35 the optical vignetting is virtually zero. However there's pixel vignetting too, ie light that hits "the walls" (not all light hits a photodiode), and I think there's a quite large amount of that with the 6um Dalsa sensors, but I'm not sure as I've not investigated it closely.

    Microlens rippling is not a crosstalk effect but a microlens shading effect, but if you see rippling you have crosstalk too for sure. The ripple pattern is affected by the crosstalk which makes it very difficult to clean up, as the rippling on the LCC shot and in the real scene will not match 100%. C1 does a good job concerning the challenge.

    When you know what to look for you can produce visible crosstalk artifacts also with the SK60XL far out in the image circle. It's obvious that the lens designers have chosen to accept some level of crosstalk, as it works in practical image making and a symmetrical design is an advantage in many other ways.

    SK lenses are more symmetrical than Rod lenses, hence more crosstalk issues with them, more microlens shading etc.

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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by f8orbust View Post
    I know that Chris Barrett reported using the S/K 35mm with the A7 on an A/S ML-2 (probably unshifted), so I'd imagine the same deal here.

    For shifts with W/A lenses I'd imagine you'd need to go with the R/S wides* as these have the longer flange-sensor distance. Not sure how much the recessed nature of the sensor in the A7 is going to vignette the effects of shifting though - time (and testing) will tell.

    Jim

    *With no outrageously expensive helical and lens mount to buy, this isn't as much of an eye-watering proposition as it used to be.
    The Arca-Swiss DSLR2 with the Sony A7 series or Nex can accept as short as 32mm lenses with lots of movement. Nex body may even go down to 28mm. Haven't had a chance to try yet.
    Nikon and Canon are limited to 70mm and above.
    We have a new magnetic bellows connection, which makes it very easy to mount and move.
    You might enjoy the added precision of the Arca-Swiss.
    And the increased movement that the shuttered Rodenstock and Schneider lenses can afford you, plus the ability to change up when you want to the benefit of 16 bit color a MF DB can bring you.
    Rod
    Last edited by RodK; 28th May 2014 at 18:28. Reason: grammar
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by RodK View Post
    ...plus the ability to change up when you want the benefit of the 16 bit color a MF DB can bring you.
    Rod
    ???? You need to do more than put a 16-bit A/D converter in a back to make it 16-bit. The sensor needs to be able to record 16-bits of information.
    Will

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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Paul2660 View Post
    I also wondering if you do shift, with the Sony which I would want to do, will C1 process the LCC's. C1 seems to be very camera specific on LCC's and will not for example allow you to use a LCC from a IQ160 on a IQ260.

    I had wondered a few years ago, if I shot LCC's with my Canon 24 TS-E, would C1 see them and allow me to apply them to images taken with my 5d MKII. I was not then worried about color cast, as it's not an issue, but with the light fall off, which you still get. C1 does a very good job with light fall off in LCC processing.

    Question to Torger, Crosstalk.

    How much is crosstalk, vs, just light fall off. You can see for example with the SK35 when shifted past 8mm, a huge amount of color saturation fall off and detail smearing. This also happens with the SK43 past around 14mm on the 60MP backs. I have always assumed this was due to lens quality, at extreme edges of the image circle, but I guess some may also be due to crosstalk. There is a definite line with the SK's where you hit the wall and the image past that spot suffers too much. You also pick up the rippling which C1 sometimes can fix on a SK, but is hard on for example a pure blue sky. C1 does better with the Rod lenses with rippling. On the color/sat fall off, C1 does not fix this at all, but again I have assumed this was due to the image circle.

    Quesiton to Steve:

    I am assuming that the Rodenstock lenses will have to have a Cambo mount? Which would be cost prohibitive (at least to me) for folks using a system other than Cambo, i.e. Arca or Alpa.

    Paul

    Hi Paul -

    The issue would be that if you had a pre-existing tech camera (Arca Swiss, Cambo, Alpa, etc), that the lenses would not be cross platform because they would have to be dismantled from the helical focus mounts of those cameras. There is a proprietary Cambo lensboard for the lenses, but that is not as important a factor as the dismantling of the helical focus mount, regardless of what board it would be mounted on from there.


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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Steve Hendrix View Post
    Hi Paul -

    The issue would be that if you had a pre-existing tech camera (Arca Swiss, Cambo, Alpa, etc), that the lenses would not be cross platform because they would have to be dismantled from the helical focus mounts of those cameras. There is a proprietary Cambo lensboard for the lenses, but that is not as important a factor as the dismantling of the helical focus mount, regardless of what board it would be mounted on from there.


    Steve Hendrix
    Capture Integration
    So in other words a whole new set of lenses will be required?
    Don Libby
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Shashin View Post
    ???? You need to do more than put a 16-bit A/D converter in a back to make it 16-bit. The sensor needs to be able to record 16-bits of information.
    And file format. Phase One IIQ L only store 14 bit, scaled up to 16 bit at load time but does not change that only 14 bit is actually stored. No real information is lost of course as the sensor can't deliver 16 bit anyway, so it's just good design of the format.

    16 bit color has been b*ll from start and most know that these days so it's not a plus for credibility to use it in marketing. Better color they may still have but for other reasons. Not an excuse to lie to the potential customer IMHO, and I'm glad that most MF sales people have dropped the 16 bit claim, but still it appears now and then. I will jump at it every time.
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by Don Libby View Post
    So in other words a whole new set of lenses will be required?

    That is my understanding - similar to the same situation if you purchased a Cambo X2. Compatible lenses would be manual aperture lenses like older Mamiya 645, RZ, Hasselblad V, etc, as well as Rodenstock and Schneider lenses, but they come in standard flat boards.

    The Cambo helical focus lenspanel would be too large for this camera.


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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by torger View Post
    And file format. Phase One IIQ L only store 14 bit, scaled up to 16 bit at load time but does not change that only 14 bit is actually stored. No real information is lost of course as the sensor can't deliver 16 bit anyway, so it's just good design of the format.

    16 bit color has been b*ll from start and most know that these days so it's not a plus for credibility to use it in marketing. Better color they may still have but for other reasons. Not an excuse to lie to the potential customer IMHO, and I'm glad that most MF sales people have dropped the 16 bit claim, but still it appears now and then. I will jump at it every time.

    I agree. In my discussions with manufacturers, there are some corollary benefits for them to utilize a 16 bit a/d converter. However, with the native bit depth of the sensor being 14 bit, the direct emphasis of "16 bit" as an advantage seems misplaced, if not misleading.

    I generally have also seen this scaled back in terms of emphasis - it is stated in materials, but doesn't seem to be as promoted as it once was. But if they stated sensor bit depth and a/d converter specifications separately, that would to be more forthcoming, IMO.


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    Re: New - Cambo Actus View Camera for Sony A7

    HI guys,
    this is a camera i am dreaming of... wonderful!!!
    You dont need the expensive helicoid of cambo or Arca or .... : Onle a simple plate!!! Thats it!!! And the Rodie lenses are possible too! Perfect!
    If this part is available i will buy it. I have some lenses with copal.

    One question: Do you need the copal shutter too? The shutter is in the A7??!?! But you need the distance... Hmm and the distance should be very tight..
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    Re: New - Cambo Actus View Camera for Sony A7

    Quote Originally Posted by mueller123 View Post
    HI guys,
    this is a camera i am dreaming of... wonderful!!!
    You dont need the expensive helicoid of cambo or Arca or .... : Onle a simple plate!!! Thats it!!! And the Rodie lenses are possible too! Perfect!
    If this part is available i will buy it. I have some lenses with copal.

    One question: Do you need the copal shutter too? The shutter is in the A7??!?! But you need the distance... Hmm and the distance should be very tight..
    Copal shutter have 2 main functions: speed control and aperture control
    A7 will be handle the speed and the copal will be handle the aperture.
    The distance will be depend on the using lens. Please also refer to posted #32 in this forum.
    Sunchai.

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    Re: New - Cambo Actus View Camera for Sony A7

    This is interesting to me. I think I just found a use for my 100HR-S! I assume if I am bullheaded enough I can figure out how to remove the helical permanently and mount it on this Cambo lens board.

    Dave
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    Re: New - Cambo Actus View Camera for Sony A7

    Hi Dave,
    unmounting a lens with copal shutter from a helial mount is very easy. But you need the right tools. You need a special "screwdriver" to unscrew it.. If you try it with a normal screwdriver you make everything scrachtes and this is not really good.

    This special tool ist not really expensive.

    Quote Originally Posted by dchew View Post
    This is interesting to me. I think I just found a use for my 100HR-S! I assume if I am bullheaded enough I can figure out how to remove the helical permanently and mount it on this Cambo lens board.

    Dave

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    Re: New - Cambo Actus View Camera for Sony A7

    Hi Sunchai,
    ok with the distance i wrote it not really good.
    With distance i mean the distance from the front lens element to the rear lens element. This is the copal shutter... But with a sony A7 you dont need a shutter. But you need the distance of the shutter with its treads..for the right lens focus..

    But i have never seen a distance "barrel" for a replacement of the shutter..?!?

    mueller


    Quote Originally Posted by Sunchai View Post
    Copal shutter have 2 main functions: speed control and aperture control
    A7 will be handle the speed and the copal will be handle the aperture.
    The distance will be depend on the using lens. Please also refer to posted #32 in this forum.
    Sunchai.

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    Re: New - Cambo Actus View Camera for Sony A7

    Mueller,
    If you want aperture control you need the shutter assembly anyway, so why not just leave the shutter in there?

    Dnve
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    Re: New - Cambo Actus View Camera for Sony A7

    Another comment: Arca-Swiss does offer the 091000.7 R bayonet adapter board for 6x9, which allows the use of any R bayonet mounted lens via the bayonet, to be mounted on the Arca-Swiss DSLR2.
    This means the same set of lenses can be used on any of our bellows cameras via adapters for 141 or 110(6x9), without reservation down to 35mmXl Schneider or 32mm Rodenstock on Sony A7/A7r. And 70mm and above for Canon and Nikon.
    Nothing needs to be changed. Just get the adapter board.
    Hope this clarifies this issue.
    Rod
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