Originally posted by davids8560 I've been looking at F and FA lenses to use with my K5, are there any compatibility heads ups that I need to know?
The only tip is that as the K-5 has the crippled mount, it will only open-aperture meter when the aperture ring is set to 'A', if not set to 'A' you need to use the green button to perform stop-down metering (most film cameras would open-aperture meter with the aperture ring set off 'A'). This isn't a limitation as all exposure modes are available on the K-5 with the lens on 'A' (unlike many film cameras).