Sigma EX 105 Macro Lense for D-SLR problem

Hi ,
I Needed a good macro lense. After looking at some magazine reviews, I
bought Sigma EX 105 DG /F2.8 Macro
It might be some error in my lense or all the reviews and pointing
system is just commercial rubbish (this lense got 9 out of 10 points)
Almost all my pictures are very soft in the corners of the pisture
while in the middle is very good and sharp. I tried with different F
scale and deffrent focus metering systems but still with same results.
Does anyone else experiencing same problem?

/Cheers

 

Take it back to where you bought it and exchange it. Every lens has
manufacturing variances, less so, it seems, with macro lenses, but they
are not immune. Also most lenses are not as sharp in the corners as the
center, again less so with macros, and unless you are using a 35mm
frame camera the should be fairly uniform. I'd just take the lens back
tell your dealer it is defective. Once took my studio 3 tries to get an
acceptable 24-70 zoom.

Tom

 

I've had one a few years now. I'm mostly using it for flowers and such
-- where the corners are mostly way out of focus. But come to think of
it I did use it for doing page images of two books, and I didn't notice
any serious problem with corner sharpness with mine.