The Pentax 645NII is a medium format SLR film camera, released in 2001 as a revision of the Pentax 645N. It supports mirror lockup and offers an expanded set of custom function settings for various camera operations. The data imprinting feature has been enhanced to include auto bracketing, AE lock, flash, focus mode, AF mode, AF area, and ISO speed. The ISO setting is now integrated into the exposure compensation dial, rather than a separate ring. It is part of the 4.5x6 format cameras.