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Old 24-03-2012, 09:30 AM
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philiphart (Phil Hart)
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Join Date: Jan 2007
Location: Melbourne
Posts: 1,060
hmm.. well it certainly gets complicated.

the 550D image is poor for f4.5.. i wouldn't be surprised by this at f2 but not right given how stopped down that is. definitely tilt somewhere given different shape aberrations left vs right side of frame. if you can prove it is the lens, then i think you would be able to ask to swap it for a new one. i think my 50mm f1.4 can do a little better than that.

the 50mm version on your 8300 does not look quite so bad though? and the 85mm only looks bad in one corner. are you always focussing on the centre of the frame? obviously if you focus away from centre and there is tilt then aberrations will be worse on opposite corner. looks like that in 85mm image to me?

keep at it..

Phil
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