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I have a 50mm 1:1.4 on my M42 camera and would like to have something similar for my Pentax Program A. Which lens would /gear/ suggest? I have an M42-PK adapter that I use from time to time but for daily use I'd prefer to use a native K-mount lens.
On ebay I could also find used FA 50 1:2.8 Macro for about ~100..150 € which is a very attractive option. I rarely use wider than f/4 anyway. Are macro lenses also well suitable for general photography? Are they somehow more difficult to focus on distant objects than ordinary 50mm lenses?