Overview

The Feinmess Bonotar 105 mm f/4.5 is a triplet lens originally for medium format folding cameras, repurposed as a cheap, light telephoto for 35mm SLRs. Its sweet spot is strong on 35mm, but maximum aperture is dim and coatings are basic. Build is fully manual with clickless aperture; three versions exist. It suits occasional users seeking an inexpensive, adaptable lens for mirrorless cameras via M42 or Exakta mounts.