Noise

dupek · Jan 30, 2011

I have T1i. I shoot a bird at some distance with Quantaray 70-300. Still was not close enough, so I crop ( while in RAW). The noise was unbearable.
The shot was done in ISO200. It is something wrong with my camera (beside being Canon) or the lens is piece of crap. I had digital rebel xt before, and had sharper photos. Less noise.

KmH · Jan 31, 2011

The lens doesn't have a great reputation.

Under exposing a digital image promotes the visiblity of noise as does a heavy crop.

Part of your issue could also be chromatic aberration, coma, and/or fringing.

Without seeing the original and the cropped photos, no one can say for sure.

dupek · Jan 31, 2011

It is the glass. I use the lens kit (18-35). Shoot a bird and crop. No noise.
Look like, I have to get Canon telephoto to have better shot. Why, to hell, the good glass have to be so expensive.

Formatted · Feb 1, 2011

It is the glass. I use the lens kit (18-35). Shoot a bird and crop. No noise.

Bad glass doesn't make images noisy. Because of its small aperture it creates under exposed images creating more noise.

KmH · Feb 1, 2011

Not all who post here have a clear understanding of what image noise is or looks like.

I have seen people call CA - noise, not understanding the difference.

Overread · Feb 1, 2011

I agree that we really need to see the photos and 100% crops to get an idea of what you are describing here. It could be the lens - it could be the camera - it could be the operator -- we honestly can't give any meaningful input though until we see the photos.

dnavarrojr · Feb 1, 2011

dupek said:
It is the glass. I use the lens kit (18-35). Shoot a bird and crop. No noise.
Look like, I have to get Canon telephoto to have better shot. Why, to hell, the good glass have to be so expensive.

You should be able to pick up a Sigma 70-300 on eBay or Craigslist for under $200 and it's a GREAT lens, in my opinion.

stevenrecords · Feb 3, 2011

its the lens and if you didn't put the camera on a tripod that could add to it. Also the cropping on a cropped sensor adds to the problem.

KmH · Feb 3, 2011

stevenrecords said:
its the lens and if you didn't put the camera on a tripod that could add to it. Also the cropping on a cropped sensor adds to the problem.

Could you explain how not putting the camera/lens on a tripod would add to chromatic aberration. :scratch:

I'm not sure I understand how a crop sensor camera adds to chromatic aberration either.