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01-24-2012, 11:57 AM   #1
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Sigma XQ Filtermatic 16mm 2.8 Fisheye

Hi all,

I have a Sigma Filtermatic fisheye lens that is M42 mount. It actually came with an Asahi M42->K adapter installed. The problem is, I don't see a manual aperture control. How can I use this lens on my K-5 (or P30T for that matter) without keeping it wide open?


01-26-2012, 05:02 PM   #2
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Location: North Carolina
Posts: 639
Original Poster
I answered my own question; the lens has to be used wide open without modifying the coupling prong. I returned it back to the shop.

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