Vivitar 28mm f/2, md to eos converted

[sammo]

Got this vivitar cheap and I converted it to EOS mount. Of course it had it's aperture blades oily and sticky. I like the optical performance, not perfectly shart, but suprisingly good at f/2. I expected that the corners will be far worse when wide open, it produces a lot of comma (on night shots point sources get cross shaped), but in the center it is quite good. What I don't like is that when it is stoped down to f2.8 and f4 it doesn't get a lot better, still missing a lot of contrast. At f5.6 it is acceptable (colour photo), both BW photos were shot at f2.
I don't like the mechanics, don't understand why 270° focus turn is needed for a wide filed lens, 90° would be more than enought for a nice focus action.

Did a few photos yesterday and today. Not so common to see so much snow on the adriatic coast.

[martyn_bannister]

Excellent shots! #3 my fave. How did you do the conversion?

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[FotoPete]

I had the similar 24/2 Vivitar (kiron made like your 2 for a while in PK mount and liked it alot on Pentax K20D. I even sent it into for a CLA after the blades slowed past my liking and it came back noticeably better. (I think there was some haze too that I'd not seen when I got the lens from eBay).

A little glowy from the coma but as you mentioned, its quite decent in the centre. Colour wasn't the most punchy but I think the subdued look won it for me.

[diddy]

The last picture has a nice atmosphere ... well done!
I have the Kiron 28mm f2, I like the color rendition and it is very sharp in the center, the corners are ok. It's definitely usable at f2.

[sammo]

The conversion was easy for this one. The MD mount was unscrewed and instead a M42 to EOS adapter was fitted on. Then only the infinity was adjusted from the front side of the lens. I had it disassembled anyway for aperture cleaning, but for conversion dissasembly is not needed.