Canon Extender EF 1.4x brand_Tougodo The tradeoff is lower max

The tradeoff is lower max ISO than the MKIII or MKIV (6400 vs 25600/32000)

9 lens that stay fully enclosed

The Tamron Adaptall 200mm f3

This is a black Hasselblad A12-6x6 back in excellent condition

Canon Extender EF 1.4x brand_Tougodo The tradeoff is lower maxCanon Extender EF 1. 4x teleconverter, in good cosmetic condition, with some paint nd finish wear. Increases the effective focal length of the lens mounted to it by 1. 4x while maintaining complete communication between lens and camera. Canon's teleconverters are not general purpose: they will work specific lenses only, and autofocus function may vary by lens and camera. Be sure to check compatibility before buying! Clean glass and excellent function.