Quote:
Originally Posted by Regulus
Tamron get good reports and my 17-50 is excellent.
It's not top of range but it's an excellent buy for the caual telephoto user. Plus the macro facility is a handy thing to have.
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I've got quite a few Tamron lenses and I think them very good too. My 400mm SD lens (their equivalent to the APO designation) is always attached to a camera for bird shots in my backyard.
As the lens test link below shows, the lens in question has some distortion in full frame cameras, but it all disappears when used in an APS camera.
I've had similar issues with my 28-300mm Tamron lens. Used in my APS DSLRs, relative to my fixed focal length lenses, it is one of my best compact zooms. But used in my old Sony A900 with the bigger sensor, I've only had disappointing not-so-sharp results at 300mm (maybe I have to spend an hour or two micro adjusting the focus at 300mm, but that may throw out the focus at lower focal lengths).
Also, a reason one can get such variable user results for the lens in the link I posted, ranging from rubbish to very good, can be due to older cameras not being able to focus older lenses very well. For example, my Minolta 500mm mirror lens was poor in my old Minolta DSLR and Sony A100, as they consistently backfocused a tiny amount using that lens. But with later cameras like my Sony A550 and Sony A57, the lens focused perfectly.
Regards,
Renato