Originally posted by pres589 This is basically why I'm always harping on the lack of a decent (don't need to be amazing, decent is good for a start) prime from a 24mm to 29mm for crop people to have available to them. Life if the optics stack from the FA 28 f2.8 had been recycled into a DA 28 f2.8 instead of them using the FA 35's to create the Plastic Fantastic 35. Or a modern Pentax interpretation of the Sigma Super-Wide II AF. A decent, "fast enough" f2.8 prime with Pentax's attention to quality. The nice thing is that there are a number of 28mm options on the used market from many vendors, some of them quite interesting, like the Vivitar 28mm Series 1 f1.9 or Pentax's K 28 f2.0, etc.
re:
the Vivitar 28 mm
"Vivitar 28mm wide angle lenses were made primarily by Kino Optical (Kiron), and Komine. There is a plethora of different versions see link below. These Kiron versions have serials 22xxxxx, the Komines have 28xxxxx serial numbers. This review page is specifically for the Kiron made f2 versions (and see also Kiron 28mm f2 reviews here ). It is available in both PK and M42 mounts. . . . "
Read more at:
Vivitar (Kiron - serial 22xxxxx) 28mm f2 Lens Reviews - Vivitar Lenses - Pentax Lens Review Database
" . . . I became particularly interested in the 28mm focal length, which used to be a great wide angle in the film era, and provides a comfortable "normal equivalent" on the APS-C size sensor of today's Pentax digital cameras. It is a bit of a mystery why Pentax have no current 28mm lens. Their FA 31mm Limited, while widely regarded as one of the best pieces of glass on the planet, measures closer to 32mm in formal tests, and so does not have the same outlook. Besides, it is very expensive. Many Pentax shooters believe that a normal lens should be available at commodity pricing.
So, back in Augst 2008 I started the thread Vivitar 28mm As FA 31mm Replacement? on Pentax Forums.
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https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/34654-vivi...placement.html ]
It soon became obvious that there were many different variants on the Vivitar 28mm, but little did I know that I would end up cataloguing over thirty of them! . . . "
http://photografica.robinparmar.com/vivitar.html
so if you are interested, you might find a 28 mm by the original makers, in other words, not labelled " Vivitar "