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Canon 300D photo, please help

Started Feb 13, 2012 | Discussions thread
imqqmi Veteran Member • Posts: 8,639
Re: Canon 300D photo, please help

I don't think it's noise from the camera.

My guess would be since you've used a long shutter speed of 20 sec you get an effect of the light bouncing off water drops of the mist and some physics that seem to cluster the light in clumps making it look like snow. It could be photon scattering like with a pinhole camera. Some photons cancel each other out while others are amplified.

I can only see the effect with the light that shines in a direct line into the camera. The other lights may contain noise but that is probably jpeg compression noise.

Oh and sodium vapor lights may also blink a lot, with a certain speed of the water drops it may hit some kind of interference pattern and give such a result. It's like a strobe flashing constantly freezing individual water droplets in place. Then some clumping together.

You could try shortening the shutter speed and see if that has an effect on the clumping together of the rays. My guess is that if you get above say 1 sec it'll smoothen out.

I noticed a lot of noise around street light and I wondering what I'm doing wrong or maybe is bad lens?? Any advice?

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Imqqmi

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