why is this not sharp ? please help me

Started Jul 4, 2013 | Questions thread
cliik Regular Member • Posts: 128
Re: one other thing

This may not apply in your case but if you by chance have a UV or some such filter on the front of the lens for protection - take it off

This afternoon I dragged out an old Sigma 24mm f2.8 lens I used in the Minolta film days and compared the sharpness to that from my 24-70 f2.8. I was horrified. The old prime was tack sharp while the new lens was soft. I'd always considered the 24-70 to be a good performer. I then realised that recently I added a (very expensive) Hoya Pro1 UV filter. I took it off and the sharpness returned.

 cliik's gear list:cliik's gear list
Pentax K-7 Sony Alpha a99 Tamron AF 28-75mm F/2.8 XR Di LD Aspherical (IF) Tamron SP AF 90mm F/2.8 Di Macro Sigma 70-200mm F2.8 EX DG OS HSM +4 more
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