XR Rikenon 50mm 1:2 L, S & P versions

XR Rikenon 1:2 50mm L

Score
IQ: 9.0/10 
Build: 8.5/10
Overall Rating: 9.0/10

Specs
Focal length: 50mm
Aperture: 2 min - 16 max
Mount: M42 screw type




I personally use the 'P' version of this lens because there is no where the pin can get stuck on my PK - 4/3 lens adapter. Yet for other Pentax owners the pin is not a problem at all if it resembles a small ball bearing.
Whatever the case, the XR Rikenon 50mm f2.0 (and hence the Rikenon P 50mm f2.0) is said to be the sharpest lens in this range of any brand! The bokeh on this is fairly different to other similar lenses and is considered to be 'busy' - some like it while others hate it!

As visible from the test shots below, it appears razor sharp. I hope to run some tests against the SMC Tak and will publish the results later.

Rikenon P 50mm 1:2 @ f2

Temp adjusted to 7600

B&W layer overlayed

Rikenon P 50mm 1:2 @ f2

Temp adjusted to 7600

B&W layer overlayed

Other photo samples elsewhere on the web:
- http://forums.dpreview.com/forums/readflat.asp?forum=1041&message=35709282
- http://farm3.static.flickr.com/2242/2397544501_bf1bb9fcaf.jpg
- http://forums.dpreview.com/forums/readflat.asp?forum=1022&message=34454579&q=rikenon+50mm&qf=m