Originally posted by BigMackCam Although it's a pricey adapter, Carol, it's well worth it. The quality is streets ahead of any other adapter I have for any camera... plus, of course, there's that leaf shutter.
About that leaf shutter and other differences: It may be timely to recall attention to the staff review in 2013 here at PF,
Pentax K to Q-mount Adapter Review - Introduction | PentaxForums.com Reviews
For me, it is crucial that the leaf shutter allows for:
1. Flash Synchronization at shutter speeds down to 1/1000s
2. Very long exposure times up to 30s (32s in Bulb mode)
No other adapter than the original Pentax one will allow for that. And yes, it is expensive but in my opinion well worth the price. My only rant is, why does it have to be so difficult (at least here in Europe) to get hold of the tripod mount adapter? I had to self-import mine from Japan.