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11-03-2007, 08:23 PM   #1
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105 mm f/2.8 DG MACRO Lens from Sigma

Hi Folks..
I have been looking at this lens..
Home & Home Office: 105 mm f/2.8 EX DG MACRO Lens for Select Pentax SLR Cameras
Can anyone offer any pros and cons?

11-03-2007, 09:07 PM   #2
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Check out this website. Sigma AF 105mm f/2.8 EX macro DG (Nikon mount) - Photozone Test Report / Review

Even though the test was done on a Nikon camera the results should be comparable.

11-03-2007, 09:10 PM   #3
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It is a very sharp lens. That said, the 105mm focal length will give you about the same field of view as a 150mm on a 1.5 crop Pentax DSLR. This is nice is you want a longer working distance, but irritating if you want to get closer. It is a slow focusing lens too, but most macros are slow focusing anyway. The 70mm macro would be better for portraiture if that's what you want it for. I personally prefer the 50mm macro. All three are very good lenses. I don't have the Pentax equivalents because they weren't available when I was shopping around. I have also heard that the Tamron 90mm Macro is a sharp lens.

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