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DPChallenge Forums >> Hardware and Software >> 20D and infrared?
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08/01/2006 06:54:23 PM · #1
I'm trying to learn how to take infrared pictues. I have tried to change my pictures to infrared through photoshop by changing the channel mixture, but it just doesn't look right. I know there are certain filters you can buy like the Hoya R72, but some examples from them don't look right either. I understand that my camera isn't the best for taking infrared, b/c of the sensor. Would it be best to get a camera that is made for infrared and if so what type, or will a filter and some photoshop do the trick? Thanks in advance.
08/01/2006 07:04:49 PM · #2
Do you have samples of the results so far?
08/01/2006 07:06:13 PM · #3
I bought a Suntec filter on ebay , a lot cheper then the Hoya and the outcome has been good but difficult. Like you said the 20D is bad for IR so the images are really red. You have to play with the channel mixer for a while to get the right effect. Here are 2 recent shots but like I said, Im still learning.


08/18/2006 05:48:16 PM · #4
I am also amazed by infrared photos... But i have no idea how they are changed in photoshop?? Is anyone skilled in this area?
08/18/2006 05:54:11 PM · #5
Originally posted by chrissycampbell:

I am also amazed by infrared photos... But i have no idea how they are changed in photoshop?? Is anyone skilled in this area?


Try this tutorial!
08/18/2006 05:54:32 PM · #6
I've not done much IR at al (none with DSLR) but I do know...

- The images as they come from the camera will always be quite red. The filters over the blue and green pixels on the sensor greatly reduce the sensitivity at those locations.
- Generally the first step in IR pot processing is swapping the red and blue channels. This can be easily done with the channel mixer.
- Although Canon DSLRs have relatively efficient hot mirrors (low sensitivity to IR) they can produce great results with long exposures.

There are quite a few older threads on this, and lots of general information that Google will surely turn up!
08/18/2006 06:11:42 PM · #7
that tutorial was great! But what excactly do I need to do in order get the infrared result to adjust in photoshop??? I shoot with Canon 20D

Message edited by author 2006-08-18 19:20:11.
08/18/2006 06:20:31 PM · #8
Originally posted by chrissycampbell:

that tutorial was great! But what excactly do I need to do in order get the infrared result to adjust in photoshop??? I shoot with Cannon 20D


Hoy R72 and a tripod and a long shutter speed.
08/18/2006 06:25:26 PM · #9
thank you
08/18/2006 08:43:51 PM · #10
The conversion is also much easier if you shoot in RAW. You can adjust the color temperature to 2000 (and I use -35 tint).
Or, put the filter on the camera, take a picture, then set the white balance from there. This will decrease the red.
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