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Rikoh Rikenon P 50mm F2
Latest Review Posted Sigma 50-500mm F4-6.3 APO EX DG
Intro: As said, this is heavy and built like a tank. It is known as the Bigma.
It is hand-holdable. But it would not last long for most people.
Macro is at 1:5.2 at 200mm. Not bad
Good: 10X zoom range is amazing. IMQ is pretty good. At 500mm end, it is better than DA55-300 at the 300mm end. That says something.
Very well built. Tolerance is high. Everything is tight. Better built than most Pentax current zoom lines.
Focusing is pretty fast in good light. It is faster than DA55-300. The speed is on par with my DA*60-250 under good light.
Aberration is well controlled. It is better than many Pentax zoom lenses.
Has the "A" setting if it means something to the user.
Bad: MF is quirkily implemented, like most other Sigma lenses.
Paint is not very durable.
Pretty heavy.
Quality control is an issue. I have to return this back to the owner, since it does not focus to infinity from 100-400mm.


Again, I love this beast. It is an optical miracle to a certain extent. Without the focusing problem, I would have kept it in my arsenal. Great for Thunderbirds and Blue Angels.



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