Asahi Bellows-Takumar 100mm f4 brand_Slik But if you have seen

But if you have seen one

and skylight options

8 Luminor Anastigmat lens

with only minor dust and compact design

The Rodenstock Omegaron 75mm f4

Asahi Bellows-Takumar 100mm f4 brand_Slik But if you have seenA classic M42 mount Asahi Bellows Takumar 100mm f4 lens designed for use with a bellows: this lens has no focusing system of its own, so it won't work directly on a camera. But on a bellows, it can focus from infinity all the way to 1: 1 magnification. In excellent condition, with light internal dust; diaphragm has a few marks, but moves well. PLEASE NOTE: This lens requires a bellows system (sold separately) for use.