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Yet Another IR-pass Attempt


arthury

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Sunny with storm clouds ... looks like different types of leaves reflect a slightly different wavelength of IR.

 

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M8; 24mm Elmarit-M Asph; Hoya IR filter; JPG+B&W; LR adjusted

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I have a hoya r25A filter, and am setting the wb through the filter, but I am not seeing the dramatic change you are-is this filter enough or is there still too much visible?

 

This was the filter I used to used with kodak infrared film, but I know that is different.

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I have a hoya r25A filter, and am setting the wb through the filter, but I am not seeing the dramatic change you are-is this filter enough or is there still too much visible?

 

This was the filter I used to used with kodak infrared film, but I know that is different.

 

Try using an IR filter rather than a red one. With IR Ektachrome one wanted to mix visible light with IR to get false color so one used color filters. Arthur's shot is more similar to IR B&W film. BTW, nice toning Arthur.

 

I took the attached shot a couple weeks ago on a research cruise in Prince William Sound, one of the first 'love boats' of the season. 135 tele-Elmar and Leitz IR filter. B&W conversion with LR.

Tom

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I have a hoya r25A filter, and am setting the wb through the filter, but I am not seeing the dramatic change you are-is this filter enough or is there still too much visible?

 

This was the filter I used to used with kodak infrared film, but I know that is different.

 

 

I was using a Hoya R72.

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A couple more from today's walk in the woods ...

 

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Looks like IR-pass filters have the same effects on blue skies as dark red filters on B&W films.

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Try using an IR filter rather than a red one. With IR Ektachrome one wanted to mix visible light with IR to get false color so one used color filters. Arthur's shot is more similar to IR B&W film. BTW, nice toning Arthur.

 

[...]

Tom

 

 

 

Thanks, Tom. These are my experimental IR images from my M8 .... glad you like it.

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I have a hoya r25A filter, and am setting the wb through the filter, but I am not seeing the dramatic change you are-is this filter enough or is there still too much visible?

 

This was the filter I used to used with kodak infrared film, but I know that is different.

Robert,

 

The 25A gives 50% transmittance at 600 nm and really only cuts off wavelengths above about 650 nm but the visible spectrum extends from around 400 nm to 700 nm so your filter's still letting a lot of visible light through.

 

The R72 gives 50% transmittance at 720 nm and cuts off wavelengths above about 750 nm so very little visible light is let through, which is why you see the stark white foliage in Arthur's images.

 

Pete.

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thanks all, that last image is spectacular.

 

I remember HIE Ir was it called, the kodak infrared? Also spectacular-spectacularly hard to print, load, process, etc! The film curl was incredible. My negs were always bullet proof. I never really got the hang of it. I will have to go out and get a R72 filter.

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since you are shooting raw plus jpeg bw, do you see anything remotely like this on the jpeg preview on the camera, or is this more the result after conversion? I think being able to see this in camera would be thrilling! to say the least. Also, makes it useful as a pallet for a paying gig, something more controllable. Ir was never controllable before.

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If you shoot raw+jpg black and white, you really do see something very much like these results on the camera LCD, and it is quite useful for image evaluation. I also use the R72, and am pleased with the results.

 

--clyde

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If you shoot raw+jpg black and white, you really do see something very much like these results on the camera LCD, and it is quite useful for image evaluation. I also use the R72, and am pleased with the results.

 

--clyde

 

 

Yes, I concur on that one but it is in B&W, of course. The ones I posted here are toned with a slight tilt towards the warmer side of the spectrum.

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If really want to have a blast of a time, try shooting red Japanese maple trees ... they seem to reflect the most IR light. You can see one at the far right in the first image of the original post.

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This is awesome. Thank the Leica gods that they let the infrared through. I'm going to be having fun with this.

 

I got a Hoya RM72 for my Noctilux and another for my Elmarit 21. I've only shot a few frames so far but I'm very pleased with the way that this is working.

 

QUESTION: Any thoughts on metering. I bracketed but I haven't figured out yet to go with the meter or open up a few stops.

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