180mm · f/2.8
The Jupiter-6 180mm f/2.8 is a fast telephoto prime for M42 mount, based on the Carl Zeiss Olympia Sonnar design. Optical strengths include good sharpness at f/2.8, though it suffers from low contrast and flare wide open. Build quality is solid but handling is manual-only with a heavy metal construction. It suits enthusiasts seeking a vintage character lens for portraiture or low-light, but not for critical sharpness or flare resistance.