Professional 35mm film SLR camera body with interchangeable viewfinders.
The Pentax LX FB-1 is the standard film back configuration of Pentax's professional LX modular camera system, paired here with the FC-1 interchangeable viewfinder. The LX's modular design allows the standard film back, finder, and motor drive to be swapped out, making it adaptable to different shooting configurations without requiring a separate body.
Pentax K bayonet mount, Pentax LX modular body with FB-1 (standard 35mm film back) and FC-1 viewfinder (pentaprism with metering display), full LX specification (titanium shutter, OTF flash metering, environmental sealing).
The LX with FC-1 finder represents the standard eye-level shooting configuration for the modular LX system. The FC-1 contains the metering display and prism finder. The FB-1 film back is the standard 35mm back; the system also accepted bulk film backs and motor drive combinations.
Test the FC-1 viewfinder metering display for correct operation. Confirm FB-1 film back sealing is light-tight. Check the titanium shutter and LX body functions. Verify the modular attachment interfaces (finder to body, back to body) engage and release cleanly.