Originally posted by Kendra59 I want to thank everyone who posted here. What a nice welcome! I will be purchasing good used SMC 35mm f2 and SMC 50 mm lens as soon as possible. The 35mm works out to 52.5 mm on APS-C cameras, which is pretty close to a normal view equivalent. The 50 mm works out to 75 mm, which should work fairly well for occasional casual portrait work. I guess there are quite a few 50 mm lens options. I don't need auto focus, but want a really sharp 50 mm lens. What are the best options for $200 or less?
Kendra
Kendra, if you're OK with manual focus, then a great lens is the SMC-A 50mm/1.7. These are available used for about C$60 or so, in mint shape. I have the older M-series version (no camera control of aperture), and it is outstanding, but a bit more fiddly to use on a dslr body. Most Pentax 50's are very sharp and excellent quality. A good resource is our lens review section:
Pentax Lenses - Pentax Lens Reviews & Lens Database
There's a DA 50/1.8 which has autofocus, and is very reasonably priced, even new. The FA 50/1.7 is also said to be excellent, works on full frame if you ever upgrade to a K-1, and reasonably priced too.
Another option, if you can put up with a loss in speed, are the 50mm macro lenses. They cost a bit more, and start at f2.8 as max aperture, but offer the versatility of macro function. I have the autofocus D-FA 50/2.8 macro and it is excellent - my sharpest lens, with wonderful colour depth. I think I paid about $200 for mine, in mint shape. This lens also has a manual focus ring and aperture ring, so will work on my film bodies too.
Re. manual focus, as a general comment, I have found that manual focus on Pentax dslrs is not the easiest thing to work with. The focus screens are made for autofocus, so when using manual focus lenses things don't really snap into focus like they do on my film bodies. It's all a bit vague, so I end up relying on the green hexagon focus aid in the viewfinder, which I quite dislike. You may want to stick with AF lenses for now.
Hope this helps!