*RARE* Mamiya SEKOR SX AUTO 21mm f/4 M42 Mount Lens - Excellent Optics.

Cosmetic condition is Very Good overall with minimal cosmetic wear from prior use. Only two repaired cracks on the focus ring rubber grip, which causes no impact on daily operation. Please refer to the listing photos for full cosmetic details.

Optical elements are crystal clear throughout. No fungus, no internal haze, no glass scratches or cleaning swipes on lens optics. Only faint residual growth on the rear lens edge, hard to find, fully cleaned.

Aperture blades and focus ring operate ultra-smoothly with no stiff spots or grinding.

All listing photos serve as part of item condition description, kindly check all images carefully before purchase.