Review on PENTAX Limited Lens - HD PENTAX-DA21mmF3.2AL Limited Silver K Mount APS-C Size - Thin Wide-Angle Single Focus Lens (21420) by Alexander Scharon

It's hard to decide between Pentax 21mm and Pentax 15mm. I ended up buying both. The reason for this is that they are different enough to serve two different (albeit sometimes overlapping) functions. The Pentax 21mm is good for photographing groups of people interacting with each other. Unlike the Pentax 15mm, it doesn't have wide-angle distortion that makes people look weird (e.g. fisheye). On the other hand, at 21mm (equivalent to 32mm in the 135mm film world) it's not a very wide angle. The Pentax 15mm is much wider and is often better suited for landscapes, cityscapes and indoor shots of rooms. As I said, there is some overlap in which lens to use for which situation, but I felt the differences were quite large. , and the pain of having to choose between two lenses was annoying enough to make me buy both. However, I understand that this is not an option for a budget lens buyer.