On the subject of screwmount lens to K mount camera bodies:
I think there's a lot of FUD (fear, doubt and uncertainty) going around about adapters: Here's what I believe about some of the myths and truths:
"Pentax adapters are preferred due to fact they can be removed with a fingernail" ... it's true that Pentax adapters can be removed with a fingernail (you have to have long nails to start with tho) but I found the correct non-pentax adapters can be removed with a ball point pen and a little grunt. Sure, it's not as easy, but is it worth 30+ dollars vs. 14.95 at B&H???... you decide.
"All non-Pentax adapters won't focus to infinity" ... This is *partially* true. If you find an adapter on ebay that looks to have a FLANGE rather than being a perfect ring, don't buy it. These flanges force the lens to sit further away from the sensor, causing the lens to not focus to infinity. They are very easy to spot, and are usually VERY inexpensive.
"The cheap ones have a little metal tab that hold the adapter in place and it could break, allowing the lens to slowly unscrew from the body as you handle it"... the truth is they ALL have this metal locking tab and the possiblity of breakage exists for ANY adapter.
I have had excellent luck with this one:
General Brand | Pentax-K Body to Universal Lens Adapter | B&H
While this particular adapter does come with a special tool to remove it from the camera body, I must tell you that this adapter is extremely heavy duty and seems machined to very exacting tolerances. I have a genuine Pentax adapter, and I prefer The B&H one because it's so strong and will support any longer (and heavy) Takumar lens you might have. I only use the tool as a "fingernail" to start loosening the adapter, then I use my fingers to rotate it out the rest of the way.
I take comfort that if I lose the adapter, I'm out 14.95. The last time I checked the Pentax Genuine was unavailable from Pentax and was selling at ebay for the frankly stupid price of 30-50 dollars a piece.
Don't be fearful, doubtful and uncertain... try out the B&H one first before you pay some ebayer double what you should for this adapter.
just my two cents...
Germar