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03-27-2012, 07:07 AM   #1
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IR filter rundown

Spencers Camera offers the following IR add-ons. To do optimum color and BW one would need 2 cameras converted...is that right?

Any feedback on the filter options:

Standard R72/89B Filter 720nm

Amplified Color IR 665nm

Extreme Color 590nm

BW 87c IR 830nm

Full Spectrum Clear UR-IR visible


Thanks!


Last edited by slackercruster; 03-27-2012 at 09:41 AM.
03-27-2012, 08:01 AM   #2
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I had them do my conversion on my K100ds and got mine done at the 665nm point. I'm very happy with it there as the additional color gives me a wider range of options in post processing, color and b&w, but I think I would have been happy at 720nm as well. You pays your money and takes your chances. Sure if you could get multiple cameras you'd have more choices but, I think you have to ask yourself, how much IR are you going to do? For me it's less than 5% of my total photography over the past 20 months. Pick one and learn to use it. I think the standard 720nm would be a good all around choice.

Oh, I may have missed the point of your question. Unless you get the 830nm conversion which is all black and white, all (or so I believe) of the conversions will allow for some color IR work. You decide in post processing whether it's color or black and white, so you don't really need multiple cameras.
03-27-2012, 09:43 AM   #3
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The typical IR conversion involves replacing the onboard IR-blocking hot.filter with an IR-pass filter, usually 720nm. Now you have an IR-dedicaed camera. Another approach is to replace the hot.filter with clear optical glass. Now you can change the spectral capability of the camera by mounting standard filters on your lenses -- IR-pass for IR shooting, or IR-block (an add-on hot.filter) for normal color.

My favorite P&S is a Sony DSC-V1 'Nightshot' with a switch that flicks-away the hot.filter. I use a set of 780-900-930-1000nm filters -- the deeper ones block more visible light, which is totally gone with the 1000nm. I can shoot handheld at ISO-100 with all those except the 1000nm. Flick the switch again, and I shoot normally. A converted SLR with optical glass replacement would give that kind of flexibility.
03-27-2012, 09:44 AM   #4
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I was thinking of converting 2 - D2000's. One for a 830 BW and the other one possibly a 665 or 590? Unless the 590 is TOO extreme?

03-27-2012, 01:10 PM   #5
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QuoteOriginally posted by slackercruster Quote
I was thinking of converting 2 - D2000's. One for a 830 BW and the other one possibly a 665 or 590? Unless the 590 is TOO extreme?
If you follow my suggestion of having a clear.glass conversion, you only need one camera converted, and can use any filter on it, for any desired IR effect.

If you must have dedicated IR cameras, be aware of filter characteristics. The longer the wavelength, the less visible light passes. 590nm is almost a #25 Red filter and doesn't really give much IR effect. 830nm blocks visible light pretty effectively. 720nm is popular because it passes enough visible light for viewfinder use.
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