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08-01-2010, 11:56 PM   #1
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Question about Sigma 10mm f/2.8 Fisheye lens

I am planning to purchase this item:
Sigma 10mm f/2.8 EX DC HSM Fisheye Lens for Pentax 477-109 - B&H

But I wonder, which kind of projection it uses? It is important for application I intend to use this lens for.

Is it "standard" fisheye like this
Fisheye Projection - Wiki
File:Medinet habu horizontal fisheye.jpg - Wiki
or like this
File:Medinet habu horizontal fisheye.jpg - Wiki
or something else?

08-02-2010, 09:45 AM   #2
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The lens specs say it makes a rectangular image. It would be 180 degrees diagonally.
08-03-2010, 08:21 AM   #3
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With regards too "Commonly there are two types of fisheye distinguished: circular fisheyes and fullframe fisheyes. "

The Sigma 10mm f/2.8 EX DC HSM Fisheye Lens is a fullframe or rectangular image lens.

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