Paul Howell
Subscriber
When I was a working PJ I shot with F, F2, and F3P, if weight matters the F3 is a tad lighter, with the meter built into the body it is not as top heavy as the metered F or F2, when the FM came out a lot of PJ bought one as back up and started to use them as a primary camera. Not as rugged as the F2 or 3, but unless you are shooting day and day out do you really need that level of build quality? If you shoot action then last consideration is the motor drive, the drive for the F3 was faster. When I upgraded from the F2 to 3, I was very tempted by the LX, with an MX as a back up. The MX is holding up, with a second beater body as a doner body for parts it should last quite a while. Until the release of the LX the MX was Pentax's top of the line body.