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06-15-2010, 04:56 PM   #1
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Pentax 55mm Vs. Sigma 50mm

This MUST have been asked many times over before but my search didn't show me anything like what I wanted so I'll ask.

I'm keen on buying one of these, but I'm not sure which one.
The 5mm difference doesn't really matter to me, I just want a good, fast 50mm lens as some of my work is in lower light conditions and the use of flash is not an option.

Pentax DA* 55mm 1.4
Sigma 50mm 1.4 EX DG

What's the difference and would I even care?

Oh, does difference between the 58mm filter diameter on the Pentax and the 77mm diameter on the Sigma count for anything?

There is the FA 50mm as well, would save me some cash too. What's the advice?

06-15-2010, 05:55 PM   #2
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Oh, does difference between the 58mm filter diameter on the Pentax and the 77mm diameter on the Sigma count for anything?

Oh, yes, definitely. The 77mm filter can often cost 2x as much as the 58mm version. Same with hoods and circular polarizers. The only good thing about having a 77mm filter/cpl/hood is that you can buy a very good one and use step down rings and attach it to any other lens you have.
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