Mamiya-Sekor 105mm f/3.5 DS Seiko Lens for TLR, Black Review

The Mamiya-Sekor 105mm f/3.5 DS Seiko lens is a medium telephoto optic designed for Mamiya's twin-lens reflex (TLR) camera system. With a classic 105mm focal length and f/3.5 maximum aperture, it offers a moderate telephoto field of view suitable for portraits, close-up work, and selective framing. This particular listing is a used unit sold in bargain condition by KEH, a well-known used camera dealer. The 46mm filter thread is standard for Mamiya TLR accessories.

As a vintage TLR lens, it fits into a niche category for film photographers who value the unique shooting experience and image rendering of mid-century Japanese optics. Bargain-grade condition from KEH typically indicates visible cosmetic wear and possible functional issues, so buyers should expect signs of use and potentially imperfect operation. At its price point, it represents an entry into the Mamiya TLR ecosystem for those willing to work with older, character-filled glass.