A Pentax Professional line camera. Integrated Direct Metering (IDM) system for unsurpassed metering accuracy, with TTL automatic flash control. * Full-information viewfinder * Interchangeable viewfinders and focusing screens * Moisture and dust resistant seals * Accepts all FA, F, A and K-series lenses FA-1 FINDER: Eye-Level Pentaprism Finder. The standard LX viewfinder, the FA-1 combines bright eye-level pentaprism viewing, built-in diopter correction, full data viewfinder display and a built-in "X" hotshoe. Built-in diopter correction is available for the -1.5 to 0 diopter range. Additional correction is possible with the correction lens adaptor and SMC correction lenses.