Post your birds (2)

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wev

wev

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My neighbor's new feeder is meeting with approval

Finch2.jpg
 
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Felisek

Senior Member
mikew said:
Your doing really well,bringing the best out in that lens,i had thought i may buy another Tamron early next year but i may now have to consider the Sigma.
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Thanks, Mike. I'm certainly learning a lot. The lens itself is not perfect, though. It is quite soft at the long end. I don't really know how it compares to the Tamron, though I suspect they are pretty much the same.

By soft I mean visibly softer than my other lenses (Sigma 17-50, 50-150; not to mention Nikon 85G - that would be unfair). I had to use a lot of sharpening to most of the pictures I published, while with my other lenses I normally do not sharpen, even after scaling. It is certainly much better at the shorter end, I'd say up to 300-400 mm is very good.

I understand that this is simply a compromise, a limitation of a (relatively) cheap lens. I know that for pin-sharp images I'd have to spend 10 times more on a Nikon 600 mmm f/4 (not to mention the super-heavy weight). Overall, I'm quite happy with it and I'm quite proud of some of my recent photos from Isle of May.

The big advantage of the Sigma over Tamron is the dock, which allows you to do fine-tuning at different focal lengths and different distances. It is not an easy procedure (in particular at long distances), but I think I managed to improve my focusing.
 
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