So, I finally bit the bullet and ordered a M42 adapter for the Olympus Pen-FT half-frame camera, basically the cheapest mount of all the adapters you can get for the Pen-FT (short of those bellow adapters). Right now I have a Olympus F.Zuiko Auto-S 38mm f/1.8 lens that came with my FT which is nice but its basically somewhat a 55mm or so perspective on the half-frame (1.44x give or take). I'm wondering what is out there in the range of 24mm or wider on the M42 screwmount lens that would make a good candidate to look into. I thought bout just getting a fisheye like the spiratone 12mm f/8 t-mount lens and putting a t-mount on top of the m42 adapter since it would still be corrected for registration distance and would be basically a 16-17 crop equiv (but with just a heck of a bit more distortion and probably a soft as hell image, but I wouldn't have to worry much bout focusing). What of some like the older Pentax SMC 24mm f/2.8 (the M42 one not the K mount one). On the flip side whats a good 50 to 55mm lens that has a nice fast aperture (1.8 or faster) that would be sharp at the center for a good portrait lens (as it'll have more or less the 80mm range on the half-framer). Basically keep in mind I am also somewhat budget minded (and yet I paid 120$ for a lens adapter... sheesh), but feel free to recommend almost anything.