Pentax SMC 6x7 45mm f/4

Pretty nice lens In terms of sharpness it's pretty sharp lens. But, it's not as sharp as Nikon 45mm tilt shift lens. Also it has more CA than Nikon. It will not give you a 22.5mm on full frame DSLR as I thought. But other than that, nice lens.

SMC Pentax 67 1:4.0/45mm Super-Wide Wide angle lens This is the lens that I reach for more often than any in my bag. For landscape and scenic photography this lens captures the scene I want. This has the gelatin film holder located on the back element which adds to the versatility for black & white filtering. I've used the 35mm fish-eye and the line bending nature of this lens is not found using the 45mm. Pentax did it right when they made this lens.

Excellent lens for the money. Easy to focus and great wide angle view. Just got this lens for my Pentax 6x7. Very good price for an excellent lens. It is amazing how affordable medium format Pentax gear is! This gives me a wide angle view to go with my Pentax 105 2.4 and 165 2.8 lens. I wish it was faster aperture but this works just fine.