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DPChallenge Forums >> Hardware and Software >> EF 75-300mm f/4.0-5.6 EF IS (NOISE) Pic in side
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 02/12/2005 03:50:16 PM · #1
This pic was take with the 75-300. Do you see the noise in the back ground? What is causing this? Will this happen with Canon Zoom Telephoto EF 70-200mm f/4.0L USM Autofocus Lens

//home.comcast.net/~rmapostol/pat.jpg

Message edited by kirbic - Converted large pic to a link :-).
 02/12/2005 04:21:47 PM · #2
It's not noise in the background, at least not noise from the camera. It's JPEG compression artifacts. They will be most noticeable in very smooth areas that are not completely uniform in color, or at the edges of detailed areas.
The image is 800x1200px but is compressed to 71kB. Try compressing less (saving at higher quality). The file will take up more space, but the results will look better.
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