The Mamiya MSX500 is a handsome 35mm SLR with a modified M42 thread mount that allows full-aperture metering with Mamiya lenses- and it's fully compatible with "classic" M42 lenses, too. In excellent cosmetic condition, with light finish wear. Good shutter speeds and metering, new light seals. The included Mamiya-Sekor SX 50mm f2 is in good working order, with some internal dust.