Some great shots on here - I recently added the 135/f3.5 M to my collection of primes (DA 15 Ltd, DA 35 Ltd, DA 70 Ltd) as a longer option that still takes 49mm filters. I've found it a little finnicky to use on occasion, but it produces good results when you get it right. Unfortunately, that's something I still struggle a little with having gotten into photography in the Golden Age of Autofocus! Shots can be seen full-size on flickr, just click.
Unhindered by Gravity by
Callan S
Taken with the 135 M on the Pentax Q (with the Pentax K-Q adapter)
Blur by
Callan S
Another Q shot, albeit one where I didn't quite nail the focus. I liked the result anyway. Call it abstract and any shot's a winner!
Backlit Leaves by
Callan S
Back on the K-S2; my first outing with the 135-M.
Sundown by
Callan S
And lastly, a manual HDR (handheld, 3-exposure) of the sunset from the hills near my house.
I'll keep practicing with it. I'm certain I'm not using it to the extent of its abilities yet!