Pentax 67 Rear Converter 1.4x adapter so if you're planning to

so if you're planning to fill it up

This is the dedicated close-up attachment for the Voigtlander 40mm f2 SL lens

Compatible with Nikon AF lenses

That's the good stuff

The Pentax Rear Converter-A 2X-S is a 2x teleconverter compatible with most Pentax K mount lenses

Pentax 67 Rear Converter 1.4x adapter so if you're planning toThe Pentax 67 Rear Converter 1. 4X is a 1. 4x teleconverter compatible with select Pentax 67 telephoto and supertelephoto lenses. In excellent condition, with clean glass and good function. Check your lens instruction manual to determine compatibility: this is not a general purpose teleconverter. Includes front and rear caps.