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Author Topic: Infrared and the 10D  (Read 2561 times)
Howard Smith
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« on: March 03, 2004, 09:15:18 AM »
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No ideas about the digital IR.  The fuzzy images may be due to focus.  Does your lens need an IR correction, and if so, did you use it?  Most lenses won't focus IR on the film plane the same as visible light.  In fact, the focus is a compromise of some colors focused in front of an some focused behind th film plane.  The Canon L lenses I've had required no coerection.
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DannoPiano
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« Reply #1 on: March 03, 2004, 09:44:21 AM »
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I don't know of any digital camera that will record in the IR spectrum. I would think that you would have to design the imaging sensor to record those wavelengths and also design the A/D converters, etc. to process this very different kind of info.

I think you may have to stick with film if you want an SLR. However, there are industrial IR cameras available. Whether or not they would be of use for "art" is another matter.
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Masatoshi Yamamoto
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« Reply #2 on: March 03, 2004, 07:48:24 PM »
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I use a Hoya RM 72 on a Canon 10D for infrared, and it works with some limitations. I often get weird kinds of lens flare, even when using a lens hood and not pointing near the sun. I've used it with the 28mm f2.8, 35mm f2, and 50mm f1.8 lenses, and they all flare. Composition is hard because the filter is nearly opaque to visible light. It must be removed from the lens, the scene composed with the camera on a tripod, the filter replaced, focus adjusted to compensate for infrared, and the picture taken. Exposures are long, typically 15-30 seconds at f8-f11 under strong sunlight. The results are somewhat soft, though not nearly as ugly looking as most black and white IR film I have used, which have awful grain. At modest sizes and with strong sharpening, the pictures look good. Foliage is white, skies are very dark, puffy clouds stand out. The color is nearly monochrome, pinkish gray, so I just convert to grayscale to print.

The RM72 is the cheaper of Hoya's two IR filters. The other one (RM 90) goes much deeper into the IR spectrum, or you can think of it as cutting much mroe visible light. The RM 90 is fantastically expensive, and I have no experience with it. The numbers indicate where the filter passes the most light. 72 means 720 nm, just slightly beyond what is thought of as the red end of the visible spectrum (400-700nm). The RM 90 passes the most light at 900 nm, much further from visible light.
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DannoPiano
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« Reply #3 on: March 04, 2004, 11:52:15 AM »
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Well, I'll be darned. That's cool.

*wonders if his 300D will do the same*
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Orbiter
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« Reply #4 on: March 02, 2004, 06:14:26 PM »
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I would like to shoot IR photos with the 10D. I would also like to use B&W IR filters to do it. My questions are: 1. Does the 10D make good IR photos with an appropiate filter? 2. Which B&W IR filter works best? To the poster with suitable answers can you direct to examples? My previous experience with IR was with a Nikon 950 and exposed/developed film for the filter. Acceptable but fuzzy. Thank you for any and all posts.
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dbarthel
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« Reply #5 on: March 03, 2004, 09:44:12 AM »
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It's my understanding that the 10D cannot do IR. The D30 could, and not sure about the D60.

Dan
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sergio
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« Reply #6 on: March 03, 2004, 10:29:02 AM »
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Take your tv set remote control and constantly press any button and point it at the camera and try different exposures. preferably do it in a subdued light place. If you can see the emitter shine then your camera is somewhat sensitive to IR light. My 1Ds works well in the test though I havenīt tried it with the Wratten 89(?) which is the full IR filter. If you make a search you will find a site with good info on the subject.
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Masatoshi Yamamoto
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« Reply #7 on: March 03, 2004, 08:01:56 PM »
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A link to some examples:
EOS 10D IR photos
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