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01/16/2005 12:01:16 PM · #1 |
| What's the best infrared filter for digital cameras? It's easy to drop the red out of a photo, but are there any that don't leave a red cast? It helps to see the final picture in the field so I know if it needs to be re-shot. |
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01/16/2005 12:10:51 PM · #2 |
I think pretty much all of them will leave a red cast, since the red channel is going to pick up the majority of the IR.
The R72 seems to be a good compromise between eliminating visible light and keeping exposures to reasonable length. The 10D has a pretty efficient "hot mirror" so exposures are going to be long, even with a filter like the R72 that passes a bit of visible (deep red) light.
Hoya makes R72 filters in pretty much all sizes; hopefully you don't need a 77mm, 'cause the price is insane.
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01/16/2005 01:14:18 PM · #3 |
I would go with an 87c (093) that way all the available light will be filtered out. example...
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01/16/2005 02:04:32 PM · #4 |
With the 10D+87c ocmbination, I think the exposures are going to be quite long, but have no first-hand experience.
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01/16/2005 04:33:33 PM · #5 |
I'm saving my pennies for one. You can find some good examples of various kinds of filters here.
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01/16/2005 06:01:36 PM · #6 |
u can get a ps fikter at adobe.com
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01/18/2005 09:31:24 AM · #7 |
Quote from Hyperfocal: I would go with an 87c (093) that way all the available light will be filtered out.
*****
That photo is just wild! It's a great example of my favorite form of the art.
Thanks for your input. That filter is going on my "short list"
Message edited by author 2005-01-18 09:46:52. |
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01/18/2005 09:41:53 AM · #8 |
Originally posted by kirbic:
I think pretty much all of them will leave a red cast, since the red channel is going to pick up the majority of the IR.
The R72 seems to be a good compromise between eliminating visible light and keeping exposures to reasonable length. The 10D has a pretty efficient "hot mirror" so exposures are going to be long, even with a filter like the R72 that passes a bit of visible (deep red) light.
Hoya makes R72 filters in pretty much all sizes; hopefully you don't need a 77mm, 'cause the price is insane. |
That has been the only real drawback of this camera. It's great if you frequently take the kinds of shots that need the hot mirror to protect the CCD. But if, like me, you are a BIG fan of IR it's a royal pain. My R72 takes about 30 to 40 seconds exposure. But I guess I'll have to live with it.
Thankfully I don't need a 77mm. But the 67mm one cost $100 and that feels insane to me considering my first set of Cokins cost about $30 (OK now you know I'm no spring chicken).
Thanks for your input. |
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01/18/2005 09:45:05 AM · #9 |
Originally posted by dsidwell:
I'm saving my pennies for one. You can find some good examples of various kinds of filters here. |
better start saving your dollars too! :)
Thanks for the site it's helpful to see the various effects. |
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01/18/2005 09:51:47 AM · #10 |
Originally posted by Rooster:
u can get a ps fikter at adobe.com |
Are they allowed in basic editing? As of now I either drop the red channel or simply do a BW conversion. Guess I was hoping that avoiding that step would give a more ethereal affect which, to me, is the whole point of IR.
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01/18/2005 12:53:32 PM · #11 |
Originally posted by DebN2003:
Originally posted by Rooster:
u can get a ps fikter at adobe.com |
Are they allowed in basic editing? As of now I either drop the red channel or simply do a BW conversion. Guess I was hoping that avoiding that step would give a more ethereal affect which, to me, is the whole point of IR. |
If applied uniformly to the whole image, various combinations of adjustments can be made to imitate the effects of IR, but none are going to be entirely successful. True IR photography is readily identifiable. I've never seen "imitation IR" that was as appealing.
Note that any plug-in filter or action that imitates IR would likely be ruled illegal if it selects any areas at all. If the effect cannot be reproduced using the standard etiting tools, (levels, curves, hue/saturation, channel mixer) it should not be used in Basic Editing.
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01/18/2005 12:59:05 PM · #12 |
Cokin do a reasonably cheap infrared which if you buy the 'P' size might be a better buy than a 67 or 77mm hoya.
See this link:
Cokin A007 Infrared 720 (89B) filter
Message edited by author 2005-01-18 13:00:13.
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01/18/2005 02:29:24 PM · #13 |
If you really are serious about IR photography, you can remove the hot mirror from in front of the sensor on your camera. Won't be good for much else, but will improve your IR exposure.
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01/20/2005 10:19:30 PM · #14 |
Originally posted by Falc:
Cokin do a reasonably cheap infrared which if you buy the 'P' size might be a better buy than a 67 or 77mm hoya.
See this link:
Cokin A007 Infrared 720 (89B) filter |
Pretty economical alternative. I'm definitely going to consider it. Thanks! |
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01/20/2005 10:21:34 PM · #15 |
Originally posted by Spazmo99:
If you really are serious about IR photography, you can remove the hot mirror from in front of the sensor on your camera. Won't be good for much else, but will improve your IR exposure. |
Don't think I'm *quite* serious enough to dedicate the camera to IR alone. Thanks anyway. |
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