Site Sponsors
Results 1 to 37 of 37

Thread: Sensor Stack Conversion for A7 and A7r to help with RF WA

  1. #1
    Senior Member
    Join Date
    Nov 2010
    Posts
    590
    Post Thanks / Like

    Sensor Stack Conversion for A7 and A7r to help with RF WA

    Kolari has a new thin stack conversion for A7 and A7r.

    Thin Filter A7 Conversion Service for Legacy 35mm Lenses | Kolari Vision Infrared

    Roger at lens rentals has his blog on this and D-Lloyd also. My own A7 sent off for the conversion.

    LensRentals.com - A Thinner Sensor Stack

    diglloyd: Modified Sony A7R Sensor Glass: Impact on Rangefinder Lens Performance

    Likes 5 Member(s) liked this post

  2. #2
    Member
    Join Date
    Mar 2014
    Posts
    235
    Post Thanks / Like
    Images
    31

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by uhoh7 View Post
    Kolari has a new thin stack conversion for A7 and A7r.

    Thin Filter A7 Conversion Service for Legacy 35mm Lenses | Kolari Vision Infrared

    Roger at lens rentals has his blog on this and D-Lloyd also. My own A7 sent off for the conversion.
    I look forward to hearing your findings. If successful maybe Sony might add a thinner stack to some of the future models, like when the Fotodiox tough mount
    came out. Or was that just coincidence?
    I note from the linked article that colour shift remains unaffected but even so there's still Cornerfix or Adobe's flat field plug-in. Best of all it would make for flawless(ish) black and white conversions.
    Likes 1 Member(s) liked this post

  3. #3
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    As you posted on the Leica forum:

    Quote Originally Posted by uhoh7 View Post

    I'm shooting mostly M9, but sent my A7 off to these guys two days ago
    digi-L has his A7r back and has been blogging.
    is a better option.

    The A7's dust shaker is a single sheet glass (~0.9mm) compared to that of the A7r which has a tougher, thicker (~1.1mm) two component epoxied dust shaker.

    Improvements will be marginal and may not be worth the price of the "conversion", especially given the current prices of the A7 cameras.

    It is also worth keeping mind that a clear cover glass on the sensor is permanently present.

  4. #4
    Senior Member Ario Arioldi's Avatar
    Join Date
    Mar 2009
    Location
    Milano, Italy
    Posts
    784
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    As you posted on the Leica forum:



    is a better option.

    The A7's dust shaker is a single sheet glass (~0.9mm) compared to that of the A7r which has a tougher, thicker (~1.1mm) two component epoxied dust shaker.

    Improvements will be marginal and may not be worth the price of the "conversion", especially given the current prices of the A7 cameras.

    It is also worth keeping mind that a clear cover glass on the sensor is permanently present.
    I have just discussed the matter (A7R vs A7) with Kolarivision and this is their reply:
    "We have seen the same improvement with the A7 as the A7r in our own testing. Our independant testers have used only the A7r so far, however the A7 has the same thickness reduction so should have the same improvement. "

  5. #5
    Senior Member mjm6's Avatar
    Join Date
    Jul 2009
    Location
    Sacramento, CA
    Posts
    526
    Post Thanks / Like
    Images
    15

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    That is not an insubstantial improvement. I wonder why Sony didn't use a thinner stack in the first place...

    Is there a penalty to this? IR leakage?

    I've sold off almost all of my Leica M glass now, so I don't think there is a point for me, but it would be interesting to see some comparisons with Leica M lenses.

    ---Michael
    a7r, a7rII, FE 16-35, FE 24-70GM, FE 70-200, Loxia 21mm, 35mm, 50mm

  6. #6
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    There is no single stack to start off.

    For an A7

    1. A ~.5 mm thick clear glass that is epoxied to the sensor.
    2. An UV/IR cut (absorptive)/ AA stack of ~1.1mm. This is a 2 component epoxied "stack".
    3. An UV/IR cut (dichroic)/dust shaker of .9mm thickness.

    Total thickness = ~2.5mm.

    I would wait for the rumored A9 or A7r II before considering a mod.

    I would also point out that with the dust shaker in place (that almost everyone appreciates), there is absolutely 0 chance of getting to a Leica M (CCD) like sensor performance.

    One ought not overlook the better colors from Sony cam that is a direct result of the sensor "stack".
    Likes 1 Member(s) liked this post

  7. #7
    Administrator, Instructor Guy Mancuso's Avatar
    Join Date
    Oct 2007
    Location
    Arizona
    Posts
    23,623
    Post Thanks / Like
    Images
    2555

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    I'm just going to wait it out and see what's next.
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com
    Likes 1 Member(s) liked this post

  8. #8
    Senior Member
    Join Date
    Nov 2010
    Posts
    590
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    There is no single stack to start off.

    For an A7

    1. A ~.5 mm thick clear glass that is epoxied to the sensor.
    2. An UV/IR cut (absorptive)/ AA stack of ~1.1mm. This is a 2 component epoxied "stack".
    3. An UV/IR cut (dichroic)/dust shaker of .9mm thickness.

    Total thickness = ~2.5mm.

    I would wait for the rumored A9 or A7r II before considering a mod.

    I would also point out that with the dust shaker in place (that almost everyone appreciates), there is absolutely 0 chance of getting to a Leica M (CCD) like sensor performance.

    One ought not overlook the better colors from Sony cam that is a direct result of the sensor "stack".
    I'm not telling anyone to do this or not to do it. I'm just sharing information. People can make up their own minds what they might want to do. 400 is the cost of a single inexpensive RF lens. An A7 body is worth about 850USD used and falling. It is currently worthless to me with many of my favorite lenses. So 400 is a no brainer investment with my own priorites, if I can start using ZM18 SEM21 28Cron, ZM35/2 and other wides on the camera with confidence. And it will be fun to see what happens.

    I think many would trade the dust protection for better wide performance, judging by long anguished threads searching for decent wides of any variety for A7 landscape shooting.

    As to color, I far prefer the M9 to what I have seen coming from either my old A7r or current A7, but perhaps others are better working with the compressed Sony Raws.

    The M9 requires very little PP for my own taste. But it's very nice to have a second body, and one that can shoot a bunch of SLR glass, which is why I bother to attempt to get better results from the A7.

    I know you have very strong views, and I don't want to get in a fight with you LOL I've enjoyed many of your shots since the A7 was introduced.

    I hope we can differ in opinion and stay on friendly terms

  9. #9
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Uhoh7, Is the dust shaker gone with the conversion?

    In case you are not aware, I have a (self modified~an year old) A7 that I use for Ultraviolet captures. It has the sensor coverglass and a 0.9 thick plate after the mod.

    There is no change from Leica mount wides.

    If using it for visible, I would have left the camera as is.

  10. #10
    Senior Member
    Join Date
    Nov 2010
    Posts
    590
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    Uhoh7, Is the dust shaker gone with the conversion?

    In case you are not aware, I have a (self modified~an year old) A7 that I use for Ultraviolet captures. It has the sensor coverglass and a 0.9 thick plate after the mod.

    There is no change from Leica mount wides.

    If using it for visible, I would have left the camera as is.
    Cool!! (your A7 UV) I'm surprised your 28 would not have improved edges in landscapes, did you really look close?

    I have a feeling the dust shaker will be gone, but I will find out for sure.

    Here's a sample SEM 21 shot with my unmodded A7:

    SEM21_5.6_corrected by unoh7, on Flickr

    I took a whole series at various apertures before sending the camera from a local vantage point, so I will be able to check it pretty close.

    Would be nice to be able to close the shutter on A7 for lens change, I wonder if there is a trick to do this?

  11. #11
    Senior Member Ario Arioldi's Avatar
    Join Date
    Mar 2009
    Location
    Milano, Italy
    Posts
    784
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    Uhoh7, Is the dust shaker gone with the conversion?

    In case you are not aware, I have a (self modified~an year old) A7 that I use for Ultraviolet captures. It has the sensor coverglass and a 0.9 thick plate after the mod.

    There is no change from Leica mount wides.

    If using it for visible, I would have left the camera as is.
    Judging from the test shots published by Lloyd Chambers, Roger Cicala and Kolarivision, the improvement is remarkable.
    Hopefully in two weeks time I will have the possibility to test it personally
    Last edited by Ario Arioldi; 18th January 2015 at 22:34.
    Ario
    www.arioarioldi.net
    Likes 1 Member(s) liked this post

  12. #12
    Senior Member
    Join Date
    Dec 2007
    Location
    belgďe
    Posts
    1,492
    Post Thanks / Like
    Images
    2

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Will be very fascinated to see the outcome.


    (I'd personally be happy with just stripping the AA filter off my A7S but nobody seems to be doing that conversion -- or are they?)

  13. #13
    Member
    Join Date
    Mar 2014
    Posts
    235
    Post Thanks / Like
    Images
    31

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Given the disappointing performance of many M wides on A7/r models, when Zeiss introduced the Loxias they made a point of promoting the fact that they had optimised the lenses performance for the Sony sensor stack. One wonders if the Kolari modification might have an adverse impact for prospective Loxia use and indeed may dissuade Sony from introducing a thinner stack on future models for the same reason? Not that Sony should care about M-mount lenses particularly but you can't help feeling there's a lot of Leica-M shooters out there who'd love a second body that will bring enhancements, especially at higher ISOs.

  14. #14
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by uhoh7 View Post
    Cool!! (your A7 UV) I'm surprised your 28 would not have improved edges in landscapes, did you really look close?

    I have a feeling the dust shaker will be gone, but I will find out for sure.

    Here's a sample SEM 21 shot with my unmodded A7:


    I took a whole series at various apertures before sending the camera from a local vantage point, so I will be able to check it pretty close.

    Would be nice to be able to close the shutter on A7 for lens change, I wonder if there is a trick to do this?
    As I said:

    (SR3) A7RII (or A9) coming in two weeks from now? | sonyalpharumors




    I tried the 21 SE (A7UV). It is sharp corner to corner with huge color drift. That lens is OK for ~380nm or so and isn't great for UV.

    BTW, uhoh7, lovely pictures you show. Yes, I see photos on other sites too.

    EDIT: I think (from the color shifts) the dust shaker would be still in place (Kolar vison mod). A pity.
    Last edited by Vivek; 19th January 2015 at 10:05. Reason: Addition
    Likes 1 Member(s) liked this post

  15. #15
    Senior Member
    Join Date
    Nov 2010
    Posts
    590
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    As I said:

    (SR3) A7RII (or A9) coming in two weeks from now? | sonyalpharumors




    I tried the 21 SE (A7UV). It is sharp corner to corner with huge color drift. That lens is OK for ~380nm or so and isn't great for UV.

    BTW, uhoh7, lovely pictures you show. Yes, I see photos on other sites too.

    EDIT: I think (from the color shifts) the dust shaker would be still in place (Kolar vison mod). A pity.
    TY for kinds words, sir. Admiration mutual.

    Many roads to Rome (but quite a few to nowhere, as well LOL).

    I'll quote a post from Charles K, who is pretty meticulous with his observations, usually, and also very nice.

    "Lloyd has further detailed his results diglloyd - Blog , comparing with the stock A7r and modified A7r, comparing with actual examples with the 18 SEM and 24 Elmar, at f/3.8, 5.6, 8 and 11. The results are very compelling in the difference between the stock and modified version of the A7r. There is no difference in the effect of vignetting or magenta cast. But this is very easily corrected in PP'ing with a simple step in LR, by taking WB disc shots with the lens at difference f stops, and keeping this shots on file. This is no different than with M9 prior to the later firmware corrections.

    I must admit I had to subscribe to see the results but it was well worthwhile. I am very glad now that I have sent my A7r to Kolari Vision I really did not expect to see such an improvement, but the 18 SEM and 24 Elmar are definitive options with the A7r MOD. I am sorry I just sold my 21 SEM "

    A thinner sensor stack may be possible after all! - FM Forums

    Of course this is not definitive. We never know till we actually have the cameras in our hand and take many shots. But it seems hopeful for some of us with A7 camera lying around and RF wides who really want to play

    Colorshift I will expect, but with A7 it is not crazy: even M240 will shift on some glass like ZM35/2, and this can be dealt with to a pretty fair degree. Smearing, on the other hand: nothing you can do.
    Likes 1 Member(s) liked this post

  16. #16
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    I know the Summilux 75/1.4 sings in Charles' hands.

    The C-V 15/4.5 (on my A7 UV) still shows mushy corners!

    Untitled by Vivek Iyer, on Flickr

    BTW, you asked about FF coverage of the pen F lenses a while ago. All do with a 2X TC. But the IQ is not worth the bother at all. A pity since the 42/1.2 via a 2X TC projects a very large image circle. This is one of the reasons why I have a thirst for a 1.4X TC for the Sony E mount.
    Likes 2 Member(s) liked this post

  17. #17
    Member
    Join Date
    Apr 2008
    Posts
    210
    Post Thanks / Like
    Images
    14

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    I am not a subscriber to diglloyd's Leica pages. Why doesn't he publish this test in "Mirrorless" where the owners of this camera are? I still have a few Leica lenses left, and this topic is about using Leica (AND similar rangefinder) lenses on Sony through a modification of the Sony. As a Sony owner and Mirrorless (and Zeiss and DAP) subscriber, I would be interested to know if I should consider such a modification.
    - END OF RANT

  18. #18
    Senior Member CharlesK's Avatar
    Join Date
    Sep 2009
    Location
    Australia
    Posts
    730
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Thank you Charlie and Vivek for the kind words

    As already mentioned my A7r has been sent away to Kolari Vision for the thin glass mod. My logic was that the A7r would depreciate quickly with the new A9? about to be announced, and having the A7II/A7s there was no downside here.

    I normally don't subscribe to sites except for Sean and in the past Lloyd for specific articles of interest. Lloyd's presentation of his results are excellent and the difference that has been illustrated with the 18 SEM and 24 Elmar is remarkable. I hope these results translate to many other lenses. The downside maybe the sensor will be prone to more dust, but probably no different than the M9/M240. Obviously Lloyd's test results are just some initial data points and hopefully this maybe a game changer for "some" of the problematic M lenses.
    Charles Kalnins
    Tallai, Queensland Australia.

    http://kalnins.zenfolio.com

  19. #19
    Member
    Join Date
    May 2014
    Location
    Singapore
    Posts
    161
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by cam View Post
    Will be very fascinated to see the outcome.


    (I'd personally be happy with just stripping the AA filter off my A7S but nobody seems to be doing that conversion -- or are they?)

    This company, https://www.maxmax.com/ can remove the AA filter. In fact, they sell several cameras with the AA filter removed, but are expensive.
    www.nns555.zenfolio.com

    Likes 2 Member(s) liked this post

  20. #20
    New Member
    Join Date
    Dec 2010
    Location
    Lyon/Taipei
    Posts
    19
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by cam View Post
    Will be very fascinated to see the outcome.


    (I'd personally be happy with just stripping the AA filter off my A7S but nobody seems to be doing that conversion -- or are they?)
    Cam, Kolari Vision can remove the AA filter at the same time they perform the filter conversion.

    I'm hesitating because the current conversion is prone, like the Leica M9, to corrosion. Kolari is working on a new type of glass that will be much more resistant. Since I live outside North America, and travel often in humid climates, it's probably worth it for me to wait. On the other hand, with the endless fall of the euro, waiting isn't so good, either. @_o

    An A7S with no AA filter and an M lens-friendly filter stack

    Jon
    Last edited by noimmunity; 21st January 2015 at 00:03.
    Likes 2 Member(s) liked this post

  21. #21
    Senior Member
    Join Date
    Dec 2007
    Location
    belgďe
    Posts
    1,492
    Post Thanks / Like
    Images
    2

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Jon, thank you, that's really good to know!

    I, too, travel a lot, and live half the time in humid climes, so corrosion is definitely an issue for me, sigh… But, yeah, an A7S like that is a dream
    my flickr
    Likes 1 Member(s) liked this post

  22. #22
    New Member
    Join Date
    Dec 2010
    Location
    Lyon/Taipei
    Posts
    19
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by cam View Post
    Jon, thank you, that's really good to know!

    I, too, travel a lot, and live half the time in humid climes, so corrosion is definitely an issue for me, sigh… But, yeah, an A7S like that is a dream
    Then again, if I understand their terms correctly, Kolari promises free replacement and eventual upgrade to non-corrosive glass, with, crucially, a fast turnaround time, to boot!
    Likes 2 Member(s) liked this post

  23. #23
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by noimmunity View Post
    .. a fast turnaround time, to boot!
    Would it be faster than a new Sony A7 series camera?
    Likes 2 Member(s) liked this post

  24. #24
    Senior Member
    Join Date
    Nov 2010
    Posts
    590
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by noimmunity View Post
    Cam, Kolari Vision can remove the AA filter at the same time they perform the filter conversion.
    Jon
    Hi Jon,

    After reading your post I contacted Kolari and asked about the AA filter.

    "it is removed during the thinner stack change, the AA filter is part of the thick stack that we exchange."

    This was the answer
    Likes 3 Member(s) liked this post

  25. #25
    Member karlfoto's Avatar
    Join Date
    Nov 2008
    Location
    Sydney
    Posts
    56
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Hi forum

    I am considering this mod for a yet to be purchased a7ii.

    Can i take it that these filter specs are true.

    For an A7

    1. A ~.5 mm thick clear glass that is epoxied to the sensor.
    2. An UV/IR cut (absorptive)/ AA stack of ~1.1mm. This is a 2 component epoxied "stack".
    3. An UV/IR cut (dichroic)/dust shaker of .9mm thickness.

    Total thickness = ~2.5mm.

    Which ones are actually removed and not put back, which ones are removed and modified with a thinner filter?

    A question for uhoh7. I saw your image of the umodded a7 with the sem 21. Have you had the mod done, and have you retested to see the improvement?

    Thanx
    Karl

  26. #26
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    You are copying what I posted without acknowledging me and asking in general if that is true?

  27. #27
    Member
    Join Date
    Dec 2014
    Location
    NYC
    Posts
    77
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    As far as I know they cannot modify an A7II. Only A7, A7R and A7S can be modified. You can easily find a used cheaper copy of A7/A7R since it voids the warranty.

    There is a long posting about it in the FM w/ different user tests:
    A thinner sensor stack may be possible after all! - FM Forums

    Quote Originally Posted by karlfoto View Post
    Hi forum
    I am considering this mod for a yet to be purchased a7ii.
    Karl

  28. #28
    Member karlfoto's Avatar
    Join Date
    Nov 2008
    Location
    Sydney
    Posts
    56
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Hi Vivak

    There was no malice intended. Sorry if i offended you.

    So what is the origin of the specs, I may as well get it straight from the horses mouth.

    Thanx
    Karl

  29. #29
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    It is me. I measured it. AFAIK, none the the guys being quoted have given the actual measurements.

  30. #30
    Member karlfoto's Avatar
    Join Date
    Nov 2008
    Location
    Sydney
    Posts
    56
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Hi Vivek

    Thanx for the answer.

  31. #31
    Senior Member
    Join Date
    Feb 2009
    Location
    Scottsdale, AZ
    Posts
    484
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    My Kolari Vision modified A7R arrived last Friday and today I finally had a chance to use it.

    I use mine only with adapted lenses (primarily a Contax N 17-35/f2.8 zoom via Kipon's electronic adapter) and for your amusement, I present here two 100% crops from before-and-after photos I took just outside my front door. The two compositions are as identical as I could make them and the lens was set to 17mm (which had been the most problematic focal length) and stopped down to f8.

    Here is a 600x600 crop of the lower left corner, taken with the unmodified camera with the OEM cover glass over the sensor:



    And here is a 600x600 crop of the lower left corner, taken of the same scene, but with Kolari Vision's thin-filter installed:



    Yes, the colors are different, because the two photos were taken under different light conditions and several months apart, but based upon this very limited test (which is nonetheless more than sufficient for my purposes, as I use this lens for ~85% of what I photograph), I will posit that this modification delivers far more than $400 worth of IQ improvement! The corners still aren't perfect, by any means, but they are now adequate whereas before they were not.

    JG

    P.S.: I've noticed no difference in IQ in the center of the photos, although many are claiming there is potentially some degradation when using Sony FE-mount lenses, as they were designed around the thickness of the original cover glass. YMMV.
    Likes 2 Member(s) liked this post

  32. #32
    Senior Member
    Join Date
    Aug 2009
    Location
    Socorro, NM
    Posts
    404
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Hi JG,

    Thank you for sharing. It's interesting that even an SLR UWA would see such substantial improvement. If you have a FredMiranda account, would you post this finding there as well? Here is the link to the thread:

    A thinner sensor stack may be possible after all! - FM Forums

    I have tested the ZM 15, Elmar 24, Biogon g 21, 28, 45, 90, Contax 55 and 85 Jahre. All have seen noticeable improvement. The wider the better, but retrofocus lenses yield better end results.

  33. #33
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    DJ,

    Does IQ involve color moire and or CA?

  34. #34
    Senior Member
    Join Date
    Feb 2009
    Location
    Scottsdale, AZ
    Posts
    484
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    DJ,

    Does IQ involve color moire and or CA?
    Vivek:

    I don't see a "DJ" in this thread, so I'm not sure if you're referring to my post above or not.

    But if you are, then in my case, the answer is No.

    This is because I convert nearly all of my photos to B&W and to my eyes, B&W moire is much less obnoxious than color moire, and I photograph almost exclusively at night, so the edges of my photos are usually hidden in shadows, eliminating most issues I would otherwise have with CA. Besides, I've found Capture One does a pretty good of eliminating it when I process the RAW files, so it's only ever a problem for me on very rare occasions.

  35. #35
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    JG, Thanks for the info.

    I also have no idea where DJ came from. Not what I intended to type.

  36. #36
    Senior Member
    Join Date
    Nov 2010
    Posts
    590
    Post Thanks / Like

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Quote Originally Posted by Vivek View Post
    DJ,

    Does IQ involve color moire and or CA?
    Hi Vivek,

    One lens which has dramatically improved for me, both for general IQ and especially CA is the Canon nFD 24/2

    This lens produced basically terrible CA issues even stopped down on the stock A7r and A7. Now, however, it is a great lens.

    Bridge in to Blue by unoh7, on Flickr

    I have yet to spot moire in any still photo with the mod, but your eye may be better for that than mine.
    Likes 3 Member(s) liked this post

  37. #37
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,607
    Post Thanks / Like
    Images
    21

    Re: Sensor Stack Conversion for A7 and A7r to help with RF WA

    Thank you, uhoh7!

    Rich blue!

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •