 - Carlton Ward  Contact Carlton Ward Carlton Ward's Gallery |
Infrared Photography I recently met a photographer that converted one of her DLSRs to shoot infrared. I have thought about doing the same but then noticed B&W sells Infrared filters. Does anyone have experience with these filters or an opinion about infrared filters vs Infrared camera conversion ? Thanks - Carlton
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Alan N. Marcus |
Hi Carlton, I don’t have any firsthand experience with filters other than Wratten so you can reject this posting out-of-hand. That being said; you likely can test your digital for IR sensitivity by using a common TV remote. Most all output IR. If you go into a darkened room and play around with the remote, assuming the camera is IR sensitive, you should be able to see the IR flashes in the viewfinder i.e. you should be able to make a picture using the TV remote as the illuminator. (I once tested a film system using a hot flatiron as the light source, as an afterthought, I ironed by perspiration wriggled shirt with it). No filter necessary for this test. Remember, a filter stops something and passes something; so an IR filter stops visible wavelengths and passes IR wavelengths. The only purpose of an IR filter mounted on a camera is to restrict the visible light rays. In a darkened room there are no or perhaps only a tiny amount of visible rays, thus the test without filter should be valid. I think you need to test your camera as I known, many digitals utilize a UV and some sport an additional IR blocking filter over the sensor to reduce noise by limiting the presentation to the chip to only the visible spectrum. The Wratten designation is 87C via the Wratten & Wainwright filter catalog acquired 1912 by Kodak. The Wainwright name was dropped, Kodak continued to honor the agreement and those filter retained the name Wratten. Alan Marcus (marginal technical gobbledygook)
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- Ken Smith Contact Ken Smith Ken Smith's Gallery |
I had my older Digital Rebel converted to IR and it's working great. As for the filters, it's my understanding that with the newer technology cameras, you need a much longer shutter speed when using the filters. Check out this site: http://www.lifepixel.com/ Wait for the video to play.
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- Carlton Ward Contact Carlton Ward Carlton Ward's Gallery |
Thank you Alan & Ken, I think I may convert a 20D after reading your posts & a few other threads, it looks like the way to go. A couple of photographers I met on my recent Europe trip have done the conversion and they produce really nice images. Thanks again - Carlton
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