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IR experiments

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My first successful attempt at taking an infra-red shot, inspired by a recent talk on this subject at Croxley Camera Club. The Leica M8 with it's extremely thin IR filter, combined with a Hoya R72 filter on the front of the lens, appears to give great results!

 

I shot the image at ISO160 using the "hidden" RAW mode in the camera and then converted to DNG using Arvid's M8RAW2DNG utility. This gave me a low-noise DNG that I could use to boost the image and counteract the loss of light caused by using the R72 infrared filter. Think I pushed the exposure +3EV in Adobe Camera Raw? Other than that, I just used Silver Efex to give me the mono look that I wanted. I'm just using Photshop Elements 11.

 

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Very pleasing result. I use LR which yields very similar results. Did you conduct tests to assess focus-shift? Which lens?

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Very pleasing result. I use LR which yields very similar results. Did you conduct tests to assess focus-shift? Which lens?

 

Glad you like it. My first tests came out really blurry until I remembered that you have to compensate for IR focus-shift.

 

I then remembered an article I have read on Luminous Landscape, which recommended using the f/4 marker. With my Elmarit 28mm f/2.8 Asph, this seemed to work nicely.

 

The Leica M8 and Infra-Red Photography - Luminous Landscape

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Very nice image. Ich have a M8 and also would like to try infrared. Unfortunately (as far as i know) the Hoya R72 filter is not available in 39mm size? Which filter size did you use? And how?

Best regards,

Peter

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B&W 092 is identical and available in 39, as is the equivalent Heliopan.

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Very nice image. Ich have a M8 and also would like to try infrared. Unfortunately (as far as i know) the Hoya R72 filter is not available in 39mm size? Which filter size did you use? And how?

Best regards,

Peter

Sorry Peter - I only just saw this.

 

A member of my camera club lent me a filter in 52mm size. I just hand held this against the front of my lens!

 

It flares a lot if the sun is in the shot, so I'd want to get the right size and use a lens hood.

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This is with a Red filter, a B&W 090, about the same as a RED 25A, 5x filter factor.

 

Red channel is visible red, Blue channel is Infrared, and Green channel gets red and infrared.

 

I1015872 by fiftyonepointsix, on Flickr

 

Starting with M8RAW2DNG; Blue and Green channels boosted to same level as Red, then Red and Blue channels are exchanged to give an Infrared Ektachrome look.

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I had a chance to take the M8 out to try the new conversion software.

 

1) This will only work with the M8;

2) this will only work using uncompressed DNG files from M8RAW2DNG.

 

B&W 090 Red filter; Blue and Green channels Equalized with Red; Blue and Red pixels exchanged.

 

I1015873 by fiftyonepointsix, on Flickr

 

All at ISO160, hand-held.

 

I1015961 by fiftyonepointsix, on Flickr

 

 

28mm Elmarit, most at F5.6.

 

More here:

 

Edited by Lenshacker

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If you want the strongest "false-color" foliage, a la Ektachrome EIR shot with a yellow filter, (screaming red foliage, without as much purple cast) you need two pictures, one taken with a pure IR pass filter (no visible light) and one with a yellow filter.

 

(example - real EIR film with yellow filter: https://c2.staticflickr.com/4/3909/15123898936_a43afc7f8a.jpg )

 

Take the yellow-filter image, and copy:

 

green channel to blue channel

red channel to green channel

 

Then copy the IR filtered red channel to the yellow-filtered image red channel.

 

(That's more or less how Kodak did it - intentionally mismatching the spectral sensivity with the dye colors.) Ektachrome EIR shot with NO filter gave the purplish pictures.

 

If you make the blue channel totally empty (black) you get a different palette (second picture).

 

This shot was hand-held, with the channels "hand-aligned" for the central tree trunk. A tripod would do better, obviously, except for moving clouds and such.

Edited by adan

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I have a color filter wheel that is computer controllable. Thiught it would be interesting to use with the M Monochrom to make color images. I could also use it with a set of filters, IR Block, 88a, 87c, to get a color-Infrared effect. I have two full-spectrum converted cameras, one is monochrome..

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Orange filter- Blue channel is left sensitive to IR.

 

I1016049 by fiftyonepointsix, on Flickr

 

I1016039 by fiftyonepointsix, on Flickr

 

Custom software boosts the Blue and Green channel to match Red, then rotates the color channels in the Color-Filter-Array Tag of the DNG header.

 

I1016044 by fiftyonepointsix, on Flickr

Edited by Lenshacker

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I got myself a R72 filter this week. Unfortunately it has been raining every day (and all "summer"), so the pictures could look more infrared-ish, but it was the best I could do.

I don't like using Photoshop so I searched for a red/blue channel swap that could work without leaving Lightroom. I found this Camera Profile: http://www.capturemonkey.com/redblueswap-lightroom-profiles

Does anyone know any better profile, or could make one?

I don't really know which is better, the first one using PS or the second one using the profile i LR. But using the profile is a lot easier and saves disc space.

 

Could someone tell me more about the method behind making the red foliage like with Ektachrome EIR?

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A comparison between M9 and M8 using a IR R72 filter. I used the Camara Profile from my last posting. The M9 needed five more EV (1/8 s vs 2s + 1,0 in LR).

M9 first, then M8:

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I got myself a R72 filter this week. Unfortunately it has been raining every day (and all "summer"), so the pictures could look more infrared-ish, but it was the best I could do.

I don't like using Photoshop so I searched for a red/blue channel swap that could work without leaving Lightroom. I found this Camera Profile: http://www.capturemonkey.com/redblueswap-lightroom-profiles

Does anyone know any better profile, or could make one?

I don't really know which is better, the first one using PS or the second one using the profile i LR. But using the profile is a lot easier and saves disc space.

 

Could someone tell me more about the method behind making the red foliage like with Ektachrome EIR?

 

 

Very nice.  I really like these colours.

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