PK primes on µ43

I finally decided to pick up a K-mount booster for my µ43 kit. This condenses the light by an additional stop, and lowers the effective focal length by .71x. The use of telecompressors has become a thing in mirrorless cameras of all sorts; I own a booster for the Nikon-F mount as well, though my Pentax lens set is better suited so the Nikon shelf is getting dusty!

Here's a table of the lenses and their new focal lengths. The 2x factor for µ43' smaller sensor is still in play. That M85/2 becomes a 60mm f/1.4, or 120mm effective; no more need for the Sigma 56/1.4! On the other hand, the 200mm converts to essentially the same lens as the 135/3.5 is by itself, so no need for speed there.

The zooms will be interesting, as the now-12-20/2.5-3.5 fisheye is now my fastest wide (widest fast?) lens for sky shooting. The talented Rikenon XR is also interesting as a 100-210mm/e, f/2.8 telephoto. 

We'll learn soon how well the adapter gets along with the Pentax lenses. Hopefully all will fit well, and the optics don't show any centering or tilt issues.

And of course, the lenses are great fun on the K-s2 even with its aperture automation inoperative; dialing in the aperture the old-fashioned way in Manual mode works fine with the infamous Green Button, and the lenses act as they should on a native body .. although the film-era lenses are still 'cropped' 1.5x by the smaller aps/C sensor.