Asahi 100mm f4 Super-Multi-Coated Macro-Takumar brand_Elinchrom 8 lens for the Canon

8 lens for the Canon FD manual-focus mount

which has very limited availability

Please note that this is not a full lens collar

The Nikon TC-17EII is an autofocus teleconverter designed for select Nikon AF-S telephoto lenses (here's Nikon's compatibility list)

whatever you want to do

Asahi 100mm f4 Super-Multi-Coated Macro-Takumar brand_Elinchrom 8 lens for the CanonThe Asahi 100mm f4 Super Multi Coated Macro Takumar is a good quality macro lens for the M42 thread mount. Clean glass, good function, decent cosmetic condition with some finish wear. Provides 1: 2 magnification without extension tubes. Not pristine, but it's got it where it counts!