Mamiya's M42 SLR kit — the 500TL with Sekor 50mm f/2.8 for screw-mount film photography.
The Mamiya 500TL with Mamiya Sekor 50mm f/2.8 is a vintage M42 SLR kit from 1966. The 500TL features TTL (Through-The-Lens) metering — advanced for 1966. The Sekor 50mm f/2.8 is the standard lens — modest aperture but Mamiya Sekor quality. The M42 mount provides universal lens compatibility — a significant advantage.
The 500TL's TTL metering was innovative in 1966. The Sekor 50mm f/2.8 provides adequate standard coverage with good Mamiya quality. The f/2.8 is slow for a standard prime. Build quality is solid Mamiya. The M42 mount means the camera accepts any M42 lens — an enormous ecosystem of vintage optics.
M42 screw mount — universal lens compatibility. Weight varies. Build quality is good 1960s Mamiya. The TTL metering requires a mercury battery — modern replacements available. 35mm film. The M42 universality is the key advantage — access to hundreds of vintage lenses from all manufacturers.
Very cheap as a complete kit. Check meter, shutter, and lens. The M42 universality provides enormous lens flexibility. The Sekor 50mm f/2.8 is adequate but slow — the M42 mount enables better 50mm options from Pentax, Zeiss, and others. A functional vintage SLR entry point.