Infrared phot with Canon 20D

Hi all, I wonder if you guys know the settings for the Canon 20D and a Hoya R72 infrared filter, so I can take some pics.
I try some settings but I can't see nothing on the screen.
Could you please give me more info on how to make infrared photography with my Canon 20D and the Hoya R72 filter?

Thanks!

I don't think it can be done, frankly.
I did see a thread some months back about a mod you can do on a rebel XT to get it to take IR pics, but it involves some serious surgery on the sensor and the filter in front of it...
If you do a search you should find it.
the Hoya filter you mention is , I am sure, designed for use with infra red film cameras.

This guy used a modded D60. Not sure if the 20D has the same IR-blocking internal filter.

It can be done. 20D has the IR filter over the sensor but from what I understand you can still do IR but with long exposures (4-30 sec). I'm thinking of trying my 20D with IR, just need to get the R72. I did a search on the site a couple of weeks ago and yielded posts with images from 20Ds - here's one http://www.photography​-on-the.net …?t=56595&highli​ght=IR+20d

It's a lot of trial and error to find the right settings. Once you've figured it out it's still a good idea to bracket to ensure you get best possible exposure.

I play around with this some. The first thing is setting your custom white balance. Some say do this with a white piece of paper (filter off), which I had good results with. Others say set the custom WB with some green grass (filter on) before taking your shot . The green grass method worked well for me. My camera with kit lens has a hot spot below 35MM, so I have better results when I stay above. The other thing is, I have to use ISO 800 to get resonable shutter speeds of around 1-2 seconds.
For post processing, I used this to get me started:
http://www.ephotozine.​com …ewtechnique.cfm​?recid=214

IR can be done on 20D, 300D, and 350XT easily.

1. Kit lens leaves hotspots, use a 50mm f/1.8 Thrifty-Fifty for no hotspots (there are other lenses that work as well)
2. Focus on your subject first, then switch to MF and attach filter
3. Take a picture and set a custom WB to that image.
4. Now take your final "keeper" picture.

Shutter speeds will vary, but on average they need around 2-8 seconds due to the cameras having the IR Cut Filter in them. I recommend shooting in RAW as well. MLU + Remote or Timer mode is recommended as well.

This was done with a 20D f/8 ISO100 10sec.

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This is impressive stuff, I'll have to give it a go, thanks!

Jamey, are you serious?

I put the R72 on my 20D and I hardly got anything to show up using ISO 1600 and 30 second shutter! It was so bad I just gave up.

Will image be in focus? IR light refracts differently from visible light and some lenses have IR mark for focus shift when used on film camera with IR film. Does it apply also on digital IR photography ?

Jamey that seems to be interesting all that, but unfortunatly I don't have a sunny day yet, so I cannot test my Hoya R72, I will wait till I get sme more light days on Chicago.
I wonder how I will put the filter after I set the focus on the image on manual mode...
That will be kind of hard

tiha wrote:
Will image be in focus? IR light refracts differently from visible light and some lenses have IR mark for focus shift when used on film camera with IR film. Does it apply also on digital IR photography ?

Image for landscapes should be pretty close to in focus yes. But IR focus still applies to digital. Yes, some lenses have red marks you can use for IR but many do not. IR is a tough style to master, specially on a camera not modded for IR or like the Sony's with Nightshot.

The easiest way to get around the focus issues is to shoot the higher f-stop to "make up" for the slight difference in the focal plane for IR.

I should have stated this in my original post, but was trying not to get too complicated. The focus issue is another reason I love the Sony for IR, it will AF just fine

mazzer wrote:
This guy used a modded D60. Not sure if the 20D has the same IR-blocking internal filter.

Those were shot with a converted camera. The IR filter on the sensor is removed and a visible filter added.

I had my D60 convereted.
Mike K

Im glad I came upon this post, I also have a Canon 20D and R72 filter. I been reading how people with this set up are able to take and achive pictures at lets say Iso 200 F8 4 sec etc.. I can't even get a image to show at that. At Iso 200 F8 and 30 sec I just about have an image, I tried a minute exposure and that was good but than tried the PP and just didnt seem like the tree's were white like they should be etc... Any suggestions would be appreciated besides telling me to have the camera converted