s.z. Posted September 22, 2004 Share Posted September 22, 2004 What is the best IR filter to use with a Canon EOS 10/20d body? Thank you Link to comment Share on other sites More sharing options...
bv photography Posted September 22, 2004 Share Posted September 22, 2004 I would suggest IR filters from Harrison & Harrison. The IR filters they manufacture are the 89-B, 88-A and the 87. All three filters in 77mm are $59.45 each. Address is: Harrison & Harrison Optical Engineers, Inc. 1835 Thunderbolt Drive, Unit "E" Porterville, CA 93257-9300 Phone: +(559) 782-0121 Toll free within the USA only: 1-(877) 213-6787 FAX: +(559) 782-0824 Office & factory hours: 7:00am to 3:00pm, Monday through Friday Good luck! Link to comment Share on other sites More sharing options...
hilander Posted September 22, 2004 Share Posted September 22, 2004 With the 10d (I'm not sure about the 20d), there is an issue with "hotspots" showing up in the photos when certain lenses are used. See this forum for more details: http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=007ew k That being said, I think the Hoya R72 works great with the proper lens. Link to comment Share on other sites More sharing options...
scott aitken Posted September 22, 2004 Share Posted September 22, 2004 I've read on forums that you can and can't get the 10D or 20D to do IR. I also had one pro camera shop tell me flattly that the 10D would not do IR. So I did some testing. I bought a Hoya R72 filter. I did some test shots today with a 28-70mm f2.8 L lens on a 20D that I just got. The attached photos show the results. Not a great photo, but it demonstrates that the 20D can, in fact, produce an IR image. The "a" version is right out of the camera, resized, but otherwise unedited. The "b" version is after conversion to B&W (using the red channel only in the channel mixer) and cranking up the contrast. This was shot with the 28-70mm f2.8 L, ISO 400, 30 second exposure at f5.6, using a Hoya R72 filter. It is pretty washed out, which I expect is the result of shooting on a cool overcast day (in fact, it was drizzling slightly as I shot this). This obviously required a tripod. With IR film under proper conditions, you can get fast enough to hand hold it. But with most DSLRs, there is a filter that filters out most IR and UV light (otherwise you'd get some pretty strange photos). Only a small amount of IR light gets through to the sensor. Thus, it requires a longer exposure to get anything to register. This may be why some people state it can't be done. If you handheld a shot at, say, 1/60th second, you would just get a blank image. The shutter wouldn't be open long enough for anything to register on the sensor. The nice thing about the DSLR is that you can just experiment with different combinations of ISO, shutter speed, and aperture until it works. Regular metering doesn't work at all with an IR filter on. On a bright sunny day, I imagine I could get away with a faster shutter speed, as more IR rays are available for capture. Usually in IR photos on a clear day, foliage is very light (as it mostly is in this sample), and the sky in nearly black. Link to comment Share on other sites More sharing options...
scott aitken Posted September 22, 2004 Share Posted September 22, 2004 Here is the same image, post processed to B&W Link to comment Share on other sites More sharing options...
dave_nelson___atlanta__ga Posted September 22, 2004 Share Posted September 22, 2004 That is pretty cool Scott. Thanks. Link to comment Share on other sites More sharing options...
denisbergeron Posted September 22, 2004 Share Posted September 22, 2004 I do IR with the 10d on a regular basis. You can see my portefolio for picture. <br>I use hoya 58mm R72 on the 50mm f1.8 and the Zenitar 16mm. I particuly like <a href="http://www.photo.net/photo/2720157"> this one </a><div></div> Link to comment Share on other sites More sharing options...
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