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DPChallenge Forums >> Tips, Tricks, and Q&A >> Infrared Photography and the Canon 30D
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09/04/2006 08:45:37 AM · #1
Just got my first infrared filter (hoya R72) and need some tips from any 30D users on digital infrared photography.

Cheers in advance

WTB
09/04/2006 10:42:31 PM · #2
I'm not a 30D user but I shoot with that same filter and here are my trial and error tips.

1) Compose and set exposure.
2)Focus before putting the filter on, turn off the camera so the focusing ability is off, put the filter on, switch the focus to manual so it doesn't try to focus itself, and turn the camera back on.
3) Open up six to seven full stops and shoot (remember to set your camera for noise reduction or whatever the equivalent Canon setting is since it will be a long exposure)
4)Check your histogram - my images that are properly exposed once converted in Photoshop have the histogram slid all the way to the left (dark) side but not so far they're blocked up.

Good luck!

Message edited by author 2006-09-04 22:59:57.
09/05/2006 09:12:04 AM · #3
Thanks tjandjwsmith, What iso would you recommend. I have tried 100 at full open F stop (3.8)but the correct exposure took me into the "bulb" setting of the 30D. If I pushed the iso up the grain became quite harsh.
I was shooting late in the afternoon and my subject was in semi shade, would this be an issue? or should i be looking for subjects that are in full sun? Have you any of your IR shots that you can post here for me?

Message edited by author 2006-09-05 09:14:34.
09/05/2006 09:21:21 AM · #4
normal IR images i take are at noon in full sunlight
i think you will run into problems if you try to do shadowed images (unless your camera is modified) ther just isn't enough reflected IR in shadows
you can see how dark the shadows are in this image
this was a "noon" picture
09/05/2006 10:13:08 AM · #5
Originally posted by ralph:

normal IR images i take are at noon in full sunlight
i think you will run into problems if you try to do shadowed images (unless your camera is modified) ther just isn't enough reflected IR in shadows


very true... unless the deep shadows are what you're really after, that is...

this one was taken around 4:30 in the afternoon

09/05/2006 02:55:08 PM · #6
Here are a couple of examples of previous exposures:
ISO 200 1.30 sec F5 taken at 7:30 in the evening in total late day shade - I'll e-mail you that example as I'm not a member and can't post a thumbnail.

Another exposure was at 6:45 in the morning before the sun had come over the hill ISO 200 1 second at F8
09/06/2006 12:40:34 AM · #7
Thanks tjandjwsmith, Nice "dunny".

It's strange, I've only had the 1st chance to play around with the filter today and i think that maybe the 30D has more anti IR filtering on the cmos than the the nikon (should have got the d200 :-))
as, for a full daylight shot i'm shooting at 5-6 sec at full open F to get an image where as the canon sureshot 520 i've got will take an image with hand held shutter speeds. BTW nice shot kudzu
09/06/2006 01:09:42 AM · #8
do you need adjustments on the 30D to shoot infrared? I want to try this too, but I don't want to screw up my camera.
09/06/2006 01:52:21 AM · #9
I've just started shooting infrared with my 350D and the Hoya filter. So far my best results have been with ISO 200 or 400, exposure time of 4-8 seconds, and opened up f-stops. To get the correct exposure, I've also found it helpful to first set a custom white balance with the filter on, using the steps suggested by tjandjwsmith. IR work does seem to require longer shutter times, so you may get some blurring if there's a breeze blowing any trees, etc. in your shot.
09/07/2006 05:31:24 AM · #10
Originally posted by biteme:

do you need adjustments on the 30D to shoot infrared? I want to try this too, but I don't want to screw up my camera.


I had stumbled across a web site that can "tweak" the cmos of the 30D for infra red photography, so I am asuming that Canon had leaned towards the "heavy" infra red filtering layer on the cmos to stop any infra red fringing that can occur whit some cmos. The price for this "tweak" was around USD 400. sorry i don't have a link for this site but maybe just Google "Canon 30D infrared"
09/07/2006 05:37:09 AM · #11
Found the web site

MaxMax
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