Pentax Q K-mount adapter
As a child with a hammer sees everything as a potential nail a Wallace with a telephoto lens sees everything…. I think you get where I’m going with this. My first adapter unfortunately failed after only a couple of hours of use but Pentax replaced it under warranty and my second one has been working without any problems. I’ve been using it with several different lenses but the one with the biggest impact has to be the DFA100 2.8 WR macro. On the Q with its 5.5x crop factor that makes it a whopping 550mm f2.8 equivelent macro lens. It’s certainly not a combination that you just pick up and start snapping away with. I’m still determining what works and what doesn’t, primarily it’s the fact that the Q isn’t a great high ISO performer and it’s quite difficult to focus a 550mm lens manually. All the shots so far have been hand-held and I’ve found that there is a real tug of war between setting a higher ISO and having a high enough shutter speed. Now that I’ve determined that there are limits I need to quantify them with a bit more rigor.
The other two lenses that I’ve been using are a 28mm f2.0 Vivitar and various Pentax 50mm lenses. These two give effective focal lengths of 154mm and 275mm respectively.
