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12-22-2013, 01:18 PM   #1
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Sigma APO 300mm f4 Prime

You don't see these come up very often, especially in Pentax mount, I can't find any record of one being sold in the marketplace or on the eBay completed listings search. Judging by user reviews on a few sites, they seem to be a very good 300mm alternative. Does anyone recall what price range these go for in Pentax mount? I would consider acquiring one if the price was reasonable compared to the Pentax brand options.

12-22-2013, 01:39 PM   #2
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I have this lens new in box. I bought it from local store as a clearance.
12-22-2013, 03:47 PM   #3
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I have purchased it online recently for about 200$, which is a very good price, and am very satisfied with it.

It focuses very close for a 300mm lens, and AF is quite fast espceially if the focus limiter is used.

Sharpness is already good in the center wide open, and very good on the whole frame from F 5.6.
12-22-2013, 04:09 PM   #4
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Thanks, have you used the Pentax 300mm glass in the past as a comparison?

12-23-2013, 08:55 AM   #5
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I have only used the Pentax DA*300mm F4 at tradeshows so I can't really compare, but IMHO the price difference is so big that I'd go for the Sigma if I were you, except if you really need weather sealing.
12-24-2013, 04:46 PM   #6
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Can anyone comment on its performance at infinity versus close range work?
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