Are you smarter than a 55-300? For this Bigmos, the answer is no.

Started Jul 4, 2014 | Discussions thread
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Simon97
Simon97 Senior Member • Posts: 2,427
Re: Are you smarter than a 55-300? For this Bigmos, the answer is no.
1

The first image is clearly in focus (sharpness of the eye) but the halo shows a definite optical aberration. It seems poor even for this type of lens. I'd be sending this thing back pronto. I don't think you'd be happy with it in the long run. I sure wouldn't.

I had a sigma 300mm f/4 APO and Sigma 1.4x teleconverter (APO?). The Kenko 1.5x is a top notch converter as well. Anyhow, this combo gave very good results. Much better than these consumer/enthusiast zooms. Problem is the lens is hard to find in the K mount and I don't know if it even functions on modern cameras.

The Sigma 400mm f/5.6 is good as well with the same caveats.

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