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Thread: G1 and IR

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    G1 and IR

    I don't know why I always decide to play with IR on a rainy day--worst situation LOL, but I was checking filters, stepdown and up rings, etc. and came across my Hoya R72, had a stepdown ring so thought I would try it. I think I tried it this Winter, but couldn't remember.

    Shoots the way I've generally always shot IR (though I do have a dedicated IR Canon body, but rarely use it)--compose, focus, set it then to MF, put filter on, half press, then used timer.

    I processed as regular IR


    and then used an interesting action for false color I have from Kromagery. Its quite flexible with 4 layers--and I process beyond that in PS.



    Ah, settings 14-45 lens, f/4.0, 6 sec. ISO 640

    Diane

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    Senior Member Brian Mosley's Avatar
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    Re: G1 and IR

    Charming image Diane, love it!

    Thanks for sharing

    Brian

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    Re: G1 and IR

    Quote Originally Posted by Diane B View Post
    I don't know why I always decide to play with IR on a rainy day--worst situation LOL, but I was checking filters, stepdown and up rings, etc. and came across my Hoya R72, had a stepdown ring so thought I would try it. I think I tried it this Winter, but couldn't remember.

    Shoots the way I've generally always shot IR (though I do have a dedicated IR Canon body, but rarely use it)--compose, focus, set it then to MF, put filter on, half press, then used timer.

    I processed as regular IR
    and then used an interesting action for false color I have from Kromagery. Its quite flexible with 4 layers--and I process beyond that in PS.
    Ah, settings 14-45 lens, f/4.0, 6 sec. ISO 640

    Diane
    I love both images. I have never tried IR - so, I get a filter that lets only IR through, and then give enough exposure to get a picture? Is there enough signal to get an image on the LCD?

    Keith

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    Re: G1 and IR

    Quote Originally Posted by woodmancy View Post
    I love both images. I have never tried IR - so, I get a filter that lets only IR through, and then give enough exposure to get a picture? Is there enough signal to get an image on the LCD?

    Keith
    Keith, you will need to focus and compose before you put the filter on--longish shutter times. The Hoya R72 is usually a good IR filter for most cameras.

    Diane

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    Re: G1 and IR

    Quote Originally Posted by woodmancy View Post
    I love both images. I have never tried IR - so, I get a filter that lets only IR through, and then give enough exposure to get a picture? Is there enough signal to get an image on the LCD?

    Keith
    Keith, There is not enough signal to get an image on the TFT screen that is useful (for focusing) with a Hoya R72 filter because there is not enough IR response in a G1. Hoya R72 has 50% transmission at 720nm. It bleeds heavy red and deep red. This is what the G1 is capable of recording as it has no IR response.

    With a stronger filter like Heliopan RG780 (50% transmission at 780nm) the signal plummets even further.

    In comparison, if you were to remove the filter stack on the NMOS sensor in G1 (or any Olympus/Panasonic camera), the IR response (RG780 filter) is 2 to 3 stops more relative to that of visible light exposure.

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    Re: G1 and IR

    Quote Originally Posted by Diane B View Post
    Keith, you will need to focus and compose before you put the filter on--longish shutter times. The Hoya R72 is usually a good IR filter for most cameras.

    Diane
    I think I will try it - does the cameras auto exposure work, or is it a case of trial and error?

    Keith

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    Re: G1 and IR

    Diane / There BOTH Quite lovely....Beautiful
    best- H

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    Re: G1 and IR

    Excellent pictures, Diane, and a good inspiration for future work.
    I'v never done IR photography before, but will be looking for the Hoya 720 nm filter in our shops !

    C U
    Rafael
    E-M1/GH2/G1 Full Spectrum & lots of lenses
    http://www.flickr.com/photos/f6cvalk...th/9226689839/

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    Re: G1 and IR

    The brightness of the LCD on OLY DSLRs can be boosted, so that in live view it's possible to use an R72 and still use the LCD to compose and focus -- works quite well. I don't know if this can also be done on the G1.
    Sláinte

    Robert.

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    Re: G1 and IR

    I could very slightly discern something in the EVF, but certainly not enough to compose and focus. It was pretty dreary--def. not an optimal day for IR shooting LOL, but its so easy to compose, focus before putting on the filter that its not really worth worrying about. You won't be able to handhold anyhow, so this will be on tripod or support.

    Rafael, the Hoya R72 for the G1 is not too expensive. I own 2 filters and step rings for various lenses (for 2 camera systems) which keeps the cost way down. I had an old Canon 10D converted to IR and it does a great job (easy to shoot IR handheld with normal shutter times)--but carrying one more body, I have found, is a royal pain, so its rarely used. Easier to carry a filter. In bright sun the shutter time amd ISOs should go down considerably.

    I haven't checked lenses in strong sunlight--but with the Canon, there are certain lenses that have a large burned area in the center of the image--there is a list of the offending lenses that most Canon IR shooters are aware of.

    Diane

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    Re: G1 and IR

    Hi Diane !

    I searched for your false-colour thing from Kromagery, unsuccessfully

    Could you say something more about it ? Is it a software, a plugin ? Or a website that does on-line conversions ?

    Also, when shooting in IR, which openings can you use ? Is there any problem with back-focusing ?

    C U
    Rafael
    E-M1/GH2/G1 Full Spectrum & lots of lenses
    http://www.flickr.com/photos/f6cvalk...th/9226689839/

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    Re: G1 and IR

    Ah, Kromagery did do IR conversions and offered the action on their site. I'll see if I can find it for you--they are in Australia.

    Here it is--the 'download' will give you the action to be installed in PS. http://khromagery.com.au/resources.html

    To use it, even if you shoot RAW, be sure and open the 'red' version (your IR image will be red to burgundy) in PS and use the action--you can adjust with any of the adjustment layers it produces. I'll go back and try it to tell how I used it for the false color. If I'm working with RAW and want a mono, I'll do most of the work in LR where I made a preset for a starter.

    For shooting IR using a filter, its best to use a tripod or support (because of shutter time--with my converted 10D I can handhold--AND compose and focus with the VF). I focused with AF and then switched to manual focus to maintain it (you could just manual focus to begin with). Then--screw on the filter--you will not be able to see much in the LCD/EVF at this point--usually just a hint of dark red light. BTW--IR is best done (for the greens to be white, etc.) in bright sunlight for landscapes--though some like IR for portraits, weddings, etc. Because of the longer shutter times, a still day works well--unless you like the 'shimmer' of foliage moving which can be interesting too--depends upon your intent.

    After I added the filter, I used the timer since I haven't gotten around to buying a remote. I just choose an aperture and ISO depending upon the day--the brighter the day, the more stopped down, the lower the ISO.

    I didn't have any trouble, it appeared, with backfocusing on the G1. I haven't done enough to say for sure, but I don't think it will be an issue. I'm going to shoot some more if our rain ever stops--its been days LOL

    IR is a fun thing--a number of years ago on the Canon SLR forum there were long threads about IR and false color IR but it doesn't seem to be very popular right now.

    IF I can add anything helpful, I'll be glad to do so.

    Best, Diane

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    Re: G1 and IR

    Thanks for your extensive information, Diane !

    In the mean time, I have a 720 nm IR filter on the road (in the air) from China to Belgium.

    I also checked the website you mentionned, but it is a kind of Photoshop plugin, isn't it ? I have PaintShop Pro, not photoshop, so it probably won't work. Have to check when I get the filter.

    Also, I saw that my Nikon lenses (except the Micro-Nikkor) have IR focusing dots to compensate for backfocusing.

    Anyway, my first interest will be B&W IR conversions !

    C U
    Rafael
    E-M1/GH2/G1 Full Spectrum & lots of lenses
    http://www.flickr.com/photos/f6cvalk...th/9226689839/

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    Re: G1 and IR

    No, its not a plugin, but it is an 'action' for Photoshop--I don't think it will work in PSP though. I don't think PSP can use PS actions--they are very specifically adjustment layers in PS----but--there are other relatively easy ways to do false color IR. I'll try to find the links--and then you can adapt to your PSP tools.

    If your lenses have the focusing dots for IR, use them. My 24-70L EF mount has them, but none of my old FDs--but usually focus isn't the issue with IR. Many want that 'glow' also--so a darker filter than the Hoya will give that--but is hard to deal with in other ways. Some are good for some cameras/lens, some not. The Hoya is a generally good one for almost all combos.

    My preference is mono IR also. Just remember that what you will get will be a red/orange/burgundy file that has to be processed to b & w.

    Diane

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    Re: G1 and IR

    I also picked a bad day (windy) to start playing with IR again, but when you get the itch it has to be scratched I tried my little 25mm f/4p Skopar that I used a lot on my M8 for IR. I could easily shoot hand held with the M8, but the G1 really needs a tripod. This shot was just a test in A mode at f/10 13sec with the B+W 092 filter. Used focus assist with the LCD to compose and focus wide open (f/4) and then stopped down for the shot. I'll do some more serious stuff tomorrow after the weather clears up.


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    Re: G1 and IR

    Couple more with the 25mm Skopar and B+W 092 filter. 13 sec and 25 sec respectively at f/11. Still too windy.




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    Re: G1 and IR

    Very nice Carl, but obviously windy--just look at those clouds in #2 LOL. Look forward to seeing more.I need to get my filter back on the G1 or get out my 10D converted to IR (which I can shoot handheld with all lenses). I keep the IR filter in my folder and should have had it yesterday--the skies were beautiful.

    Diane

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    Re: G1 and IR

    Hi Di

    Quote Originally Posted by Diane B View Post
    I don't know why I always decide to play with IR on a rainy day--worst situation LOL,
    well ... not really, just not stereotypical ;-)

    I gave IR a go on my G1 and wasn't really that impressed. I still have a few bricks of the last batch of HIE that Kodak made in my freezer back in Australia so I haven't felt the need to get an SLR converted .... yet



    I would ask why you have an IR converted camera and don't use it much?

    meantime I've been wanting to convert a camera like a Nikon 990 such as Dave Burren used to act as a meter for me.

    I've a feeling that the G1 will act as as an excellent IR camera (assuming no lens problems with hot spots) as the contrast detect IR should give you perfectly fine AutoFocus. I found with my Nikon that I get perfect AF operation when using a Wratten 87 on it.

    I am thinking quite seriously of getting a conversion on the G1 and placing a removable IR filter behind the lens to enable dual purpose use. This company has an interesting system.

    should keep some dust off the sensor too ;-)

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    Re: G1 and IR

    Hi

    thought I'd give this a fang with the unmodified G1. I tried it with the kit lens and didn't like what the image looked like (plus it wouldn't AF).

    using a c mount I got this:


    with the following processing method:

    taken with the Computar C-Mount f1.3 12mm lens on the G1 and a Hoya R73 IR filter. Processing is using dcraw on the image and extracting R and G layers (discarding B) and then blending them to get a combination of hilight detail from the Green layer and shadow from the Red

    with this unlikely candidate right out of the camera

    Last edited by pellicle; 12th July 2009 at 03:14.

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    Re: G1 and IR

    I am going to surgically remove the AA/IR cut filter in one of my G1s. The camera has no useful UV or IR sensitivity as is. I have done this (surgery) on an E-410 and it is superb (for UV and IR). The NMOS sensor is more sensitive than the CCD sensors I was used to.

    Hutec's filter application for Canon DSLRs is neat but I am afraid there is no room for such a possibility with the G1.

    Doing IR with f/0.95 on the G1 would be fun.

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    Re: G1 and IR

    Quote Originally Posted by pellicle View Post
    Hi Di

    I would ask why you have an IR converted camera and don't use it much?
    Its just a simple situation of ending up carrying several bodies and lenses. Since I've been shooting a lot more with the G1, I carry it plus lenses. Then--often for any shooting that will be mostly landscapes, I usually carry the 5D also with the lenses I prefer for it. The 10DIR is a 6MP older tech camera--still great shots with it but its not as pleasing to handle--and I find that after years of piddling with IR I just don't have as much interest in it except very sporadically so I hate to carry that 3rd camera along (and I've found that it seems to like particularly a lens I never use with the 5D--the 28-135 IS LOL).

    Diane

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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    The camera has no useful UV or IR sensitivity as is.
    Vivek, do you mean in terms of having to use a long shutter time? I had no trouble doing IR with the G1 and the Hoya R72--but, as I said, with a relatively longish shutter time (see above). This has been true with all my Canons from D30 (which was a pretty good IR body, through the D60 (which was a terrible IR body--as I recall the filters were blamed), the 10D which was okay, 20D--okay--5D--okay--but again, all absolutely needed tripod mount and longish shutter times. This was all with the Hoya R72. The 10DIR converted by Lifepixel is handholdable, works with all lenses except my 12-24--really none of the WAZ plays well with it for AF but it was calibrated to a 50 I believe--guessing that makes a difference.

    Diane.

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    Re: G1 and IR

    Quote Originally Posted by Diane B View Post
    Vivek, do you mean in terms of having to use a long shutter time? I had no trouble doing IR with the G1 and the Hoya R72--but, as I said, with a relatively longish shutter time (see above). This has been true with all my Canons from D30 (which was a pretty good IR body, through the D60 (which was a terrible IR body--as I recall the filters were blamed), the 10D which was okay, 20D--okay--5D--okay--but again, all absolutely needed tripod mount and longish shutter times. This was all with the Hoya R72. The 10DIR converted by Lifepixel is handholdable, works with all lenses except my 12-24--really none of the WAZ plays well with it for AF but it was calibrated to a 50 I believe--guessing that makes a difference.

    Diane.
    Agree. I have a little Canon 350D that was converted by maxmax.com and that is fine for action shots when I need it. Image below was shot at 1/400 sec f/11, ISO 400. The maxmax conversion removes the AA/IRcut package and replaces with only an IR pass filter so there is also a significant gain in resolution without the AA filter.


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    Re: G1 and IR

    Quote Originally Posted by Diane B View Post
    Vivek, do you mean in terms of having to use a long shutter time? I had no trouble doing IR with the G1 and the Hoya R72--but, as I said, with a relatively longish shutter time (see above).
    Diane.
    Hi Diane, With the Hoya R72, you have 50% transmission at 720nm (the transmission increases after that in the IR region) and the filter itself (you can see through it with naked eyes) has a good bit of red transmission. The G1 has no IR sensitivity at all. What you and others are recording are deep red images that gives "similar" IR effect. With a regular red filter, you would get the same on the G1.

    The E-420 is similar to the G1 in IR behaviour. I removed the AA/IR cut filter and now the IR sensitivity is ~5 stops more (R780 filter, very little red, if any, compared to the Hoya R72) than the corresponding visible light sensitivity.

    Besides the poor sensitivity, the clarity also takes a big jump once the internal AA/IR cut filter pack is removed (E-410).

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    Re: G1 and IR

    There is another IR thread going and the company Precision Camera seems to make the conversions for a lot less than Maxmax. I have a Canon A620 sitting unused in NY that I am going to send off for conversion next week!

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    Re: G1 and IR

    I have a Cokin red filter, but it has quite a much less effect than the Hoya does on the G1. I do understand about the various filters, etc. Its been debated for a long time with digital cams and what filters to use. There are quite a lot of sites (most old now since the majority of people interested in lots of IR shooting are having cameras converted) about the various filters, but, for me, the effect is sufficient with the R72. Its not so different from my converted 10D--at least to satisfy my bit of shooting (except that the 10D is handholdable--but requires I carry yet one more body and lens[es]). I think those that shot film HIE IR want more of a glow--in fact, years ago someone had a pretty decent action that created that HIE glow with the digital/R72 and the other darker filters.

    If you were near me, I'd love to have you fiddle with some of my older cams (like the 400d or G9) but, alas, those of us that don't understand or have any of your talent in doing this have to do with whatever we have LOL.

    Thanks for your explanation--do you have any examples???--your examples sometimes help better than anything to get it across.

    Best, Diane

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    Re: G1 and IR

    Quote Originally Posted by TEBnewyork View Post
    There is another IR thread going and the company Precision Camera seems to make the conversions for a lot less than Maxmax. I have a Canon A620 sitting unused in NY that I am going to send off for conversion next week!
    Check LIfepixels also--I don't remember if there was any difference or not--but they do offer several different filter options.

    Diane

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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    Hi Diane, With the Hoya R72, you have 50% transmission at 720nm (the transmission increases after that in the IR region) and the filter itself (you can see through it with naked eyes) has a good bit of red transmission. The G1 has no IR sensitivity at all. What you and others are recording are deep red images that gives "similar" IR effect. With a regular red filter, you would get the same on the G1.

    The E-420 is similar to the G1 in IR behaviour. I removed the AA/IR cut filter and now the IR sensitivity is ~5 stops more (R780 filter, very little red, if any, compared to the Hoya R72) than the corresponding visible light sensitivity.

    Besides the poor sensitivity, the clarity also takes a big jump once the internal AA/IR cut filter pack is removed (E-410).
    Vivek, The G1 with a B+W 092 filter (same as R72 or the Wratten equivalent) is definitely recording near IR response. The images I posted above demonstrate a clear Wood effect that is only obtainable with near IR. You can't replicate this with just a red filter using light in the visible spectrum. I've made comparisons with several IR pass filters that cut at various wavelengths and there is really not much difference in the recorded IR image between an 093 and the 092 or R72 other than the additional visible red light that is also passed with the two latter filters.
    See: http://homepage.mac.com/scho/MySlide...iltercomp.html
    Last edited by scho; 12th July 2009 at 09:52. Reason: add info

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    Re: G1 and IR

    Hi

    Quote Originally Posted by Diane B View Post
    Its just a simple situation of ending up carrying several bodies and lenses.
    fair enuff ... sorry if I irked you by asking ... as one who loves IR laments it going and can't afford a converted camera I was just curious.


    The 10DIR is a 6MP older tech camera--still great shots with it but its not as pleasing to handle--and I find that after years of piddling with IR I just don't have as much interest in it except very sporadically so I hate to
    sounds fair ... I loved my 10D and just recently sold it. I still have 2 EOS bodies and 2 lenses (50 f1.8 and 24 f2.8) which work nicely with IR, if you happen to be interested in off loading that 10D IR then subject to price I will be interested. It will have to wait till I'm out of though, Finland cos this nations tax laws are so "stinking money grabbing ba5tard" that I would end up paying about $200 just in taxes for it (even if you sold it to me for $200). Unlike Australia there is essentially no "free threshold" and after the last 2 years I'd not want to give them any extra cash. God willing that'll be January.

    :-)

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    Re: G1 and IR

    Quote Originally Posted by pellicle View Post
    Hi



    fair enuff ... sorry if I irked you by asking ... as one who loves IR laments it going and can't afford a converted camera I was just curious.


    sounds fair ... I loved my 10D and just recently sold it. I still have 2 EOS bodies and 2 lenses (50 f1.8 and 24 f2.8) which work nicely with IR, if you happen to be interested in off loading that 10D IR then subject to price I will be interested. It will have to wait till I'm out of though, Finland cos this nations tax laws are so "stinking money grabbing ba5tard" that I would end up paying about $200 just in taxes for it (even if you sold it to me for $200). Unlike Australia there is essentially no "free threshold" and after the last 2 years I'd not want to give them any extra cash. God willing that'll be January.

    :-)
    Oh, not irked at all :>)

    I don't dislike the 10D. I ended up keeping it over the 20D when I sold off a lot to buy the 5D a number of years ago. The 10D handled more like the 20D plus I had the grip for it if I chose, I liked the very quiet shutter sound--and I had had good luck with it. Now, I guess, the quite small LCD (which I use almost totally just to read a histo), smaller VF than the 5D are what keep me from using it more--but--truly its just keeping up with 3 bodies if I go out. When I shoot--I have to get in a car and go somewhere since I don't go into a city for work--and that means packing up and making a decision what goes that day--and what stays home. The 10D has been staying home

    It will stick around--mostly because I'm very bad about selling anything off. One might need it I just need to take a good day for IR shooting and spend time with it again. There's no question its nicer to shoot with than the G1/filter but OTOH, having the Hoya in the folder with the polarizer and NDs means I have it if I find a good shooting opportunity for IR.

    Diane

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    Re: G1 and IR

    Here are two comparison shots taken with the G1 (a Noflexar 35/3.5 at f/5.6, ISO100) of the backside of a house plant. Soft evening light directly on the leaf.

    The visible capture:



    Exposure: 1/640s

    The "IR" capture with a Hoya R72 filter on the lens, same aperture, ISO:



    Exposure: 20 seconds

    The same leaf under same conditions with the Hoya R72 on a modified E410 (image processed/resized the same way as the G1 image).



    Apart from the >12 stop exposure difference, the typical tonality from IR is lacking in the HoyaR72 on G1 capture.

    I tried the Heliopan R780 on the G1 and gave up after 40 seconds. This filter on the modified E410 made little difference in terms of exposure.

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    Re: G1 and IR

    Here is how the IR cut filter in E-410 looks like under IR.



    In visible light, the same filter pack:



    another view:


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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    Here are two comparison shots taken with the G1 (a Noflexar 35/3.5 at f/5.6, ISO100) of the backside of a house plant. Soft evening light directly on the leaf.

    The visible capture:



    Exposure: 1/640s

    The "IR" capture with a Hoya R72 filter on the lens, same aperture, ISO:



    Exposure: 20 seconds

    The same leaf under same conditions with the Hoya R72 on a modified E410 (image processed/resized the same way as the G1 image).



    Apart from the >12 stop exposure difference, the typical tonality from IR is lacking in the HoyaR72 on G1 capture.

    I tried the Heliopan R780 on the G1 and gave up after 40 seconds. This filter on the modified E410 made little difference in terms of exposure.
    Vivek, The key to extracting the IR image from the "masked" image (visible red pollution) is in RAW processing. First, you MUST shoot in RAW and process the image in something like ACR that permits custom WB adjustment. The easiest route in ACR is to simply use the custom WB dropper (gray one) and in your image the green leaf is the correct target for this adjustment. Try this with the RAW image from your second shot above and it should look almost exactly the same as your third image after WB adjustment. All of the G1 images I posted above looked like your second shot initially (although not as saturated nor as orange tinted as yours), but after WB adjustment and further processing they looked almost the same as your 3rd IR image. The IR data is in the G1 images but you have to separate it from the visible. I agree that using a dedicated IR camera is much easier and more versatile, but for an occasional IR image of appropriate subject matter (no subject movement) you can still produce a "true" IR image from the G1 with a bit more processing labor.

    Regards,
    Carl

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    Re: G1 and IR

    Hi, Diane,

    this is one of the first pics I shot with my new IR720 filter.
    Kitlens 14-45 @ 14mm iso400 0.8sec f3.5
    It was a very windy day, you can see the trees moving.

    For conversion, I simply adjusted CT for neutral grey leafs, and the sky dropped in like it is now.

    This may not be what you expect from IR photography, but I really like this result :



    C U,
    Rafael
    E-M1/GH2/G1 Full Spectrum & lots of lenses
    http://www.flickr.com/photos/f6cvalk...th/9226689839/

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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    The G1 has no IR sensitivity at all. What you and others are recording are deep red images that gives "similar" IR effect. With a regular red filter, you would get the same on the G1.
    I did a simple test - activating and viewing my tv remote through the EVF of the G1. I can clearly see the light from the IR transmitter, so there must be some sensitivity to IR, no?

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    Re: G1 and IR

    Quote Originally Posted by GDI View Post
    I did a simple test - activating and viewing my tv remote through the EVF of the G1. I can clearly see the light from the IR transmitter, so there must be some sensitivity to IR, no?
    No. What I found, I showed.

    (Can you see the LED light from your IR transmitter with your eye?).

    BTW, Carl's B+W 092 (695nm 50% transmission) is not equivalent to the Hoya R72 (720nm 50% transmission), it (092) has more red transmission.

    FWIW, I disclosed what I found to be the case with the G1 and IR. My intention is not to dismiss what others may find it to be useful or not.

    My earlier cameras (Nikon D70, Epson R-D1s- unmodified) had more more noticeable IR sensitivity than a Nikon D80 or a Nikon D40x or an Olympus E-410 or a G1 (all unmodified).

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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    No. What I found, I showed.

    (Can you see the LED light from your IR transmitter with your eye?).
    No, I can't - it is not visible light. Of course knowing the camera can detect some IR doesn't mean it can detect enough to be practical with an IR pass filter, especially one passing red, as you point out.

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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    I am going to surgically remove the AA/IR cut filter in one of my G1s. The camera has no useful UV or IR sensitivity as is. I have done this (surgery) on an E-410 and it is superb (for UV and IR). The NMOS sensor is more sensitive than the CCD sensors I was used to.

    Hutec's filter application for Canon DSLRs is neat but I am afraid there is no room for such a possibility with the G1.

    Doing IR with f/0.95 on the G1 would be fun.
    There is no problem getting IR images with filters that cut near the visible red/near IR boundary of approx.700 nm. I actually prefer using either an R72 or B+W 092 instead of a black IR pass filter (eg. B+W 093) because they give you enough visible light in the mix to do false color IR images, such as the ones posted earlier in the thread. You also will have shorter exposure times compared to using IR pass filters that cut well into the IR end of the spectrum.

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    Re: G1 and IR

    I got my G1 back from Precision Camera. I had it modified with the 665nm option.
    These two shots are my first attempt (false color).

    Abandoned Schoolhouse --G1 IR and kit lens



    Wolf River --G1 IR and kit lens

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    Re: G1 and IR

    Hi Cindy,

    Looking pretty cool. Can you give me an idea of your processing?

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    Re: G1 and IR

    Terry,
    Before you shoot, you need a WB preset. Precision may have done this for you. If not, shoot the leaves on a tree or grass (fill the frame) and save it as a preset. Leave it on this preset forever.
    I swapped the channels in channel mixer and made a preset for IR. Now I can just click for the conversion (false color). Read about it here: http://deborahsandidge.com/-/deborah...le.asp?ID=2903
    Deborah Sandidge has a great article on conversion.
    I did some masking on the schoolhouse image to change the colors around a bit.
    It seems like the possibilities are endless.

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    Re: G1 and IR

    Quote Originally Posted by TEBnewyork View Post
    Hi Cindy,

    Looking pretty cool. Can you give me an idea of your processing?
    Here are 2 helpful URLs for RAW IR processing
    http://khromagery.com.au/ir_raw.html

    Actually the second is a PS action for false color--see the download.
    http://khromagery.com.au/resources.html

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    Re: G1 and IR

    G1 IR and kit lens

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    Re: G1 and IR

    Cindy, These are some of the first shots from your IR dedicated G1?

    (Please provide some data- aperture, shutter speed, ISO).

    If you have, you can also try mounting stronger IR filters (720nm, 760nm, etc) on the lens to get stronger IR effects.

    On the RAW file of the shot you posted, you could also try the black or white dropper and look at the color IR.

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    Re: G1 and IR

    Quote Originally Posted by Vivek View Post
    Cindy, These are some of the first shots from your IR dedicated G1?

    (Please provide some data- aperture, shutter speed, ISO).

    If you have, you can also try mounting stronger IR filters (720nm, 760nm, etc) on the lens to get stronger IR effects.

    On the RAW file of the shot you posted, you could also try the black or white dropper and look at the color IR.
    First shots from G1 IR. I have lots of experimenting to do to find the sweet spot.

    G1 IR and kit lens- 14mm, iso 100, f/8, 1/60

    G1 IR, kit lens- 14mm, iso 100, f/14, 1/60

    G1 IR, kit lens- 14mm, iso 100, f/11, 1/30

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    Re: G1 and IR

    Thanks for the additional info, Cindy.

    The diffraction limit (visible light) on this sensor is f/11. I would keep the aperture at or above f/5.6 and not stop down any further. Diffraction sets in earlier in IR.

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    Re: G1 and IR

    Quote Originally Posted by Cindy Flood View Post
    I got my G1 back from Precision Camera. I had it modified with the 665nm option.
    These two shots are my first attempt (false color).
    ]
    Very nice IR images Cindy. Its great to have the option of handholding for IR with a converted camera. Does sensor cleaning still work or was that lost in the conversion?

    Many options for false color conversions. Here is a simulation of the four seasons I did many years ago from a full color and IR shot of the same scene using a Nikon 950. Just mouse over the seasons.

    Seasons

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    Re: G1 and IR

    Quote Originally Posted by scho View Post
    Very nice IR images Cindy. Its great to have the option of handholding for IR with a converted camera. Does sensor cleaning still work or was that lost in the conversion?

    Many options for false color conversions. Here is a simulation of the four seasons I did many years ago from a full color and IR shot of the same scene using a Nikon 950. Just mouse over the seasons.

    Seasons
    Carl, The Seasons is a beautiful series.

    I'm looking forward to trying out all of my lenses. I don't want to be limited to the kit lens. I love the idea that there is lots of room for experimentation. The fact that you can shoot IR scenes when the light is too contrasty for regular photography was very appealing to me.

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    Re: G1 and IR

    G1 IR with kit lens- 14mm, iso 100, f/8, 1/250

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    Re: G1 and IR

    Cindy, I can not say anything about the colors (my monitor sucks) but your last pic appears mushy. You may want to drop the exposure by a few eVs to avoid overexposure.

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