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Anonymous
>>63776 The white dots are dust on your lens. Get a lens cloth and go to work, gently, so as not to scratch it.
To reduce noise, there's a couple things you can do. The best option would be to buy software like Noise Ninja or Noiseware, that specialize in removing noise and work with Photoshop. The next would be to use in-Photoshop noise reduction.
Lastly, long exposures make noise, too, just like a high ISO speed. Play around with your camera- sometimes a slightly higher ISO and a lower shutter speed will make less noise, but it's usually the opposite in my experience.
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