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10/24/2006 05:33:05 PM · #1 |
Hi all, I never really shot at ISO 800-1600 because I don't like the noise the camera produce at this sensitivity but I'll probably have to do it a lot in a near future. some experiment seems to show that shooting at ISO1600 +1.0EV and then bringing the exposure down one stop in ACR give lot better results than shooting at ISO800 0.0EV. are there other tips to use beside neatimage wich I hate too? What are the best techniques to keep noise low at high ISO?
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10/24/2006 05:36:51 PM · #2 |
Not any other "tricks" besides shoot with the lowest ISO you can afford to use and stick to cameras noted for their low noise/high ISO ratings :)
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10/24/2006 06:01:06 PM · #3 |
You have stumbled across a big tip right there. Expose for the highlight, not the shadows. In other words, try to get the histogram as far to the right as you can without blowing highlights. You can bring it back down in PP. This leads to a less noisy picture than one which was underexposed and brought up in PP.
The problem is that people usually switch to ISO 1600 to try to improve their shutter speed. The technique above, naturally, forces the shutter speed slower again.
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10/24/2006 06:53:00 PM · #4 |
You can also work on techniques for holding the camera steady at slower shutter speeds - bracing yourself, your arms particularly, against walls etc., learn about breathing and when is best to shoot - halfway through an out breath works for me, work on not tensing up whilst you shoot (most people do), squeezing the shutter release rather than pressing it, and so on. All of which will allow you a slower shutter spped, and thus a lower ISO, and less noise.
Alternatively, learn to appreciate what 'noise' can do for your images.
Ed
Message edited by author 2006-10-24 18:53:31. |
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10/24/2006 06:53:23 PM · #5 |
Originally posted by DrAchoo:
You have stumbled across a big tip right there. Expose for the highlight, not the shadows. In other words, try to get the histogram as far to the right as you can without blowing highlights. You can bring it back down in PP. This leads to a less noisy picture than one which was underexposed and brought up in PP.
The problem is that people usually switch to ISO 1600 to try to improve their shutter speed. The technique above, naturally, forces the shutter speed slower again. |
after more experiment I found out that pushing +.05EV @ ISO1600 gives result as clean as a ISO800 shot but with the speed of ISO1200. The same @ ISO800 gives results almost as clean aas ISO200 but with the speed of ISO600. I' ll probably post exepriment results here later.
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10/24/2006 06:54:43 PM · #6 |
| I'll have to try this -- I'm not happy with the noise I'm getting even at ISO 400 : ( |
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10/24/2006 08:52:20 PM · #7 |
I did these test on tripod with mirror lock-up to avoid camera shake and to make sure the results were as accurate as possible. Post your conclusion here, I'm still trying to make my mind about what is the best.
The first test here is a series of RAW shot ranging from ISO100 to ISO1600. The ISO800 and 1600 shots are at 0.0, +0.5, +1.0EV and the brought back to correct exposure at the time of conversion. Everything in ACR was set to neutral (execpt for EV comp. of course) and no noise reduction as well as USM was Applied in ACR nor in photoshop. Here they are.
 
The second test is the same series of shots but with a more typical conversion. Curves, saturation, brightness etc. were adjusted in ACR, the same setting was used for both shots except for EV comp. of course. Obviously this kind of conversion bring more noise but still, no noise reduction or USM was applied. Here they are.
 
I'll be happy to hear what you guys think.
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10/24/2006 09:05:33 PM · #8 |
Originally posted by nicklevy:
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Nice comparison shots. ***OOPS NEVER MIND*** I'm going to have to try that with my camera. Though I don't shoot in the dark often, it's a good thing to know.
Message edited by author 2006-10-24 21:07:51.
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10/24/2006 09:34:14 PM · #9 |
| My conclusion is that the 350D's performance at high ISOs is VERY impressive! |
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