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Karel Bata · Jul-24-2012, 12:41 PM #1

I've got a pair of Canon 600Ds on loan from a college (for a 3D project), I took a quick test shot using each before leaving them in a locker there overnight. They both have Canon EF 24mm lenses which were set at infinity. The metadata says the exposures were 1/2000 and 1/4000, so there's a stop difference.

Any ideas why is one is so much sharper than the other? I could take it back, but the place is about to close up for the summer and I'd rather fix the problem myself so I can hang on to them for the next six weeks. Any ideas?

arodney · Jul-24-2012, 03:00 PM #2

Could be a back focus issue on one.
http://www.learn.usa.canon.com/resou..._article.shtml
Or the mount is screwed up on one.

Karel Bata · Jul-24-2012, 10:56 PM #3

Thanks for the reply.

Wouldn't both those problems look like a focus issue - some parts of the image being sharper than the rest? This is soft overall.

MarkR · Jul-25-2012, 06:33 AM #4

Can you try another shot with the affected camera?

Karel Bata · Jul-25-2012, 08:18 AM #5

I certainly will! I need to get this fixed.

I wanted to go in today and pick them up, but it'll have to wait till tomorrow.


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Jul-24-2012, 12:41 PM #1
Karel Bata ^OP Karel Bata Join Date: Feb 2009 Location: London (a posh bit) Posts: 41	Why is my picture soft..? I've got a pair of Canon 600Ds on loan from a college (for a 3D project), I took a quick test shot using each before leaving them in a locker there overnight. They both have Canon EF 24mm lenses which were set at infinity. The metadata says the exposures were 1/2000 and 1/4000, so there's a stop difference. Any ideas why is one is so much sharper than the other? I could take it back, but the place is about to close up for the summer and I'd rather fix the problem myself so I can hang on to them for the next six weeks. Any ideas?

Jul-24-2012, 03:00 PM #2
arodney Major grins Join Date: Jan 2007 Location: Santa Fe Posts: 1,913	Could be a back focus issue on one. http://www.learn.usa.canon.com/resou..._article.shtml Or the mount is screwed up on one. __________________ Andrew Rodney Author "Color Management for Photographers" http://www.digitaldog.net/

Jul-24-2012, 10:56 PM #3
Karel Bata ^OP Karel Bata Join Date: Feb 2009 Location: London (a posh bit) Posts: 41	Thanks for the reply. Wouldn't both those problems look like a focus issue - some parts of the image being sharper than the rest? This is soft overall.

Jul-25-2012, 06:33 AM #4
MarkR Accused Shill. Join Date: Feb 2006 Posts: 2,096	Can you try another shot with the affected camera?

Jul-25-2012, 08:18 AM #5
Karel Bata ^OP Karel Bata Join Date: Feb 2009 Location: London (a posh bit) Posts: 41	I certainly will! I need to get this fixed. I wanted to go in today and pick them up, but it'll have to wait till tomorrow.


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