Bronica 105mm f/3.5 Zenzanon MC Lens for ETR System Review

The Bronica 105mm f/3.5 Zenzanon MC is a medium telephoto lens designed for the Bronica ETR medium format system. At 105mm, it sits just beyond the standard focal length for 645 format, making it a versatile choice for portraits, product work, and general shooting where a bit of compression is desired. The f/3.5 maximum aperture is typical for medium format glass of this era, offering decent speed for shallow depth of field effects on the larger negative.

This is a multi-coated (MC) Zenzanon optic, part of Bronica's original lens lineup for the ETR system introduced in the 1970s. The MC coating helps reduce flare and improve contrast compared to earlier single-coated designs. Build quality is solid and all-metal, consistent with the ETR system's professional aspirations. The 62mm filter thread is a common size. This particular example is listed in excellent (EX) condition from KEH, suggesting minimal cosmetic wear and full optical clarity, with front and rear caps included.