Rear Lens Cap Massa SB1628 for M42 Mount

The Massa SB1628 rear lens cap is designed for lenses with an M42 screw mount, providing a practical protective cover for the rear element and mount during storage and transport. Made to fit standard M42-threaded lenses, this cap helps reduce the entry of dust and dirt and offers basic protection against minor knocks and scratches. Its snap-on design allows quick attachment and removal without tools, supporting efficient workflow for photographers and collectors who handle multiple lenses.

Advantages

The cap offers a reliable fit for M42 screw-mount lenses, ensuring the rear element remains shielded when the lens is not in use. Its lightweight construction keeps added bulk minimal while preventing foreign particles from reaching the inner optics. The simple snap-on mechanism makes it suitable for repeated use and fast lens changes, and the material resists everyday wear common in storage and transport situations.

Suitable for

• Photographers using M42-mount lenses who need protective covers during storage and transport
• Collectors and owners of vintage or manual-focus M42 lenses
• Camera technicians and rental services that require economical protective accessories

Key specifications

• Compatibility: lenses with M42 screw mount
• Type: rear lens cap (snap-on)
• Material: durable lightweight plastic
• Function: protects rear element and mount from dust, dirt and minor impacts

How to use

Align the internal threads or bayonet seating of the rear lens cap with the lens mount and press gently until the cap snaps into place, confirming a secure fit. To remove, press the cap's release points (if present) or grip the cap firmly and pull straight off to avoid twisting the lens. Use the cap whenever the lens is detached from the camera or stored in a bag or case to maintain the condition of the rear optical surface and mounting threads.

Usage recommendations

Keep the cap clean and inspect it periodically for cracks or deformation; replace if damaged. Store caps separately or attached to lenses to avoid misplacement. Avoid exposing the cap to high heat or solvents that may degrade the plastic over time.