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09-28-2011, 11:21 AM   #1
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Infrared with 645D/67II?

Hi all,

is it possible to shoot infrared pictures with the 645D and an infrared filter? If so, which filter would you recommend for dramatic results (dark sky, bright leaves etc..)?
If not, which film would you recommend for a Pentax 67? I am thinking of trying out efke IR 820 AURA and the Kodak AEROCHROME III 1443.

Let me know,
thanks
Alex

09-28-2011, 11:35 AM   #2
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I've shot efke IR820 in 120 roll with a Hoya R72 filter at EI 3, IIRC. The exposure was fine and with the expected IR look. It doesn't hurt to bracket with IR film. And at that slow of an exposure index, you'd better carry a tripod.

Last edited by tuco; 09-28-2011 at 12:01 PM.
09-28-2011, 11:01 PM   #3
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Ilford 200 SFX + wratten 89B???
09-29-2011, 07:56 AM   #4
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IR with P645D

I use a R72 (similar to Kodak 89b) IR filter with my P645D. Exposure times outdoors are many seconds so a tripod is required. Many of my lenses have IR focus markings which is a big help since we don't live view.

09-29-2011, 08:03 AM   #5
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My first post didn't work so here is #2. I use a R72 IR filter (similar to Kodak 89b) on my P645D. Most of my lenses have IR focus marks which is a big help since we don't have life view.
09-30-2011, 02:20 AM   #6
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Original Poster
what is a R72 IR filter like? Can you still look thru it? Or is it too dark?
What are the settings for the 645D in order to be able to shoot infrared?

Sorry bout all those questions. Totally new to this thing. Thanks!
09-30-2011, 02:26 AM   #7
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The Rollei IR 400 is more sensitive.
09-30-2011, 07:50 AM   #8
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IR with P645D

THe R72 filter is a very very dark red - it looks black unless you look at a very bright object. Exposure times are always a lot longer than I want - maybe 8 secs at f/8 outdoors in full sun. It's defintely tripod time!

09-30-2011, 07:59 AM   #9
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QuoteOriginally posted by phonoline Quote
what is a R72 IR filter like? Can you still look thru it? Or is it too dark?
What are the settings for the 645D in order to be able to shoot infrared?

Sorry bout all those questions. Totally new to this thing. Thanks!
The filter factor for the R72 on Wikipedia lists it as 16 (4 stops) but looking through my R72 is darker and more dense with a red cast than looking through my 9-stop ND filter.
09-30-2011, 08:32 AM   #10
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QuoteOriginally posted by fs999 Quote
The Rollei IR 400 is more sensitive.
The efke 820 has a really nasty curl. How is the Rollei IR in that regard? I have a few rolls but haven't shot it yet.
09-30-2011, 11:43 AM   #11
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QuoteOriginally posted by tuco Quote
The filter factor for the R72 on Wikipedia lists it as 16 (4 stops) but looking through my R72 is darker and more dense with a red cast than looking through my 9-stop ND filter.
I guess it's the filter factor for IR, since visible light must be filtered much, much more. Your eyes can barely see 720 nanometers at all, so what it looks like isn't gonna tell anything about the transmittance.
09-30-2011, 12:25 PM   #12
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QuoteOriginally posted by Makten Quote
I guess it's the filter factor for IR, since visible light must be filtered much, much more. Your eyes can barely see 720 nanometers at all, so what it looks like isn't gonna tell anything about the transmittance.
Sure, that makes sense. And my eyes see less of the longer wavelengths these days.

IR LED lights, they say, you can see a faint, red glow when they are 720nm and are invisible by 840nm.
09-30-2011, 01:31 PM   #13
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Hi, these are my two first tests with Hoya R72 and tripode (645D + FA 45-85mm) :






Using only Silkypix and ACDSee Pro, i am sure the treatment could be improved...

Last edited by Zygonyx; 09-30-2011 at 02:09 PM.
09-30-2011, 01:54 PM   #14
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QuoteOriginally posted by phonoline Quote
If not, which film would you recommend for a Pentax 67?
You might want to try Rollei Retro 80s. It is sensitive into the IR range and I have seen some work done using R72 filter. Google image search "Rollei Retro 80s" + R72. You can get the film from Freestyle (N. America) or from Maco Direct (EU).


Steve

P.S. RR 80s has a nice flat film base...curl is not an issue.
09-30-2011, 11:55 PM   #15
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Konica IR film

Some pictures done with the Konica IR film but I am not sure If the still sell that one.
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