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Old Aug 4, 2007, 11:38 AM   #1
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Hey all,

Just snapped this last night. I was pretty happy with the capture but upon more detailed inspection, I was let down. There are numerous specks of various colours and light throughout the image. Can anyone let me know why this happens? Here are the specs on the shot:

Olympus EVOLT E500, 14-45mm 3.5 kit lens at 14mm, f22, 40 second exposure, ISO-100, -1 step Exposure Compensation. There was also a UV filter on the lens;




Olympus EVOLT E500, 14-45mm 3.5 kit lens at 14mm, f22, 60 second exposure, ISO-100, -1 step Exposure Compensation. There was also a UV filter on the lens;



The shots above are scaled down and you may not see what I'm talking about. I'll attached the two full sized images for your perusal.

Any thoughts???
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Old Aug 4, 2007, 12:44 PM   #2
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its called noise

due to lenght of exposure

u could try a noise reducing software to clear it up

Gary
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Old Aug 4, 2007, 12:54 PM   #3
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Any particular software you'd recommend?
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Old Aug 4, 2007, 4:42 PM   #4
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cristovao12 wrote:
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Any particular software you'd recommend?
I use NeatImage. If you can send me the origanl pic, I will see what I can do. I did use one that you provided and it did pretty good.

I tried to reupload the pic, but forum said the pic size was to big. How did you put the pic in the message?

G.W.
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Old Aug 4, 2007, 6:30 PM   #5
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The camera has a function for noise reduction that subtracts a dark frame of the same shutter duration. The bad part is it slows you shooting while your waiting for the second (dark) frame. The good side is it does a really nice job on these longer exposures. I think it only works for quite long exposure.




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Old Aug 5, 2007, 4:49 AM   #6
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gwheaton wrote:
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I tried to reupload the pic, but forum said the pic size was to big. How did you put the pic in the message?

G.W.
its hosted elsewhere and linked into the site

Gary
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