Overview

The Spiratone 400mm f/6.3 is a vintage preset telephoto lens from the 1960s-70s, known for surprisingly good optical performance given its low price. It is fully manual, requiring manual focus and aperture control, and uses a T-mount adapter for various cameras. Optical strengths include decent sharpness when focused correctly, but weaknesses include a dim f/6.3 aperture that makes focusing challenging, especially on modern DSLRs without focusing aids. Build is solid but handling is cumbersome; the preset aperture rings are intuitive but the lens is long and heavy, often needing support. It suits photographers comfortable with manual operation and willing to work around its limitations for budget telephoto reach.