Massa lens adapter for Cokin 55mm filter system SB615 — 55 mm thread

The Massa lens adapter SB615 allows photographers to attach Cokin 55 mm filter system holders to lenses with a 55 mm front thread. Built from a combination of metal and plastic, this adapter provides a secure transition between the round 55 mm lens thread and the square/rectangular Cokin holder interface, enabling the use of Cokin-compatible square and rectangular filters for creative control over exposure, color and gradients.

Advantages

The adapter offers reliable mechanical fit for lenses with a 55 mm front thread and a Cokin filter holder, reducing light leaks and ensuring proper alignment of square and rectangular filters. Its mixed metal and plastic construction balances durability with lightweight handling, while the precise thread profile supports stable mounting and easy removal during field use.

Suitable for

• Landscape photography with graduated neutral density filters
• Architectural photography requiring precise filter placement
• Long-exposure scenes where square neutral density filters are used
• Any workflow requiring use of Cokin square or rectangular filters on lenses with 55 mm thread

Key specifications

• Mount thread size: 55 mm front lens thread
• Compatible filter system: Cokin 55 mm type square/rectangular holders
• Materials: metal and plastic construction for strength and reduced weight
• Interface: converts circular lens thread to Cokin holder interface allowing sliding of filters

How to use

Screw the adapter onto the lens front using the 55 mm thread until it seats securely without cross-threading. Slide the Cokin holder onto the adapter interface according to the holder’s alignment markers and tighten any locking ring if present to prevent rotation. Insert the desired Cokin square or rectangular filters into the holder slots and adjust their vertical position visually to position graduated filters or stack multiple filters as required.

Usage recommendations

Ensure the adapter is clean and free of sand or grit before mounting to avoid damaging lens threads. When using heavy filter stacks, support the holder to minimise stress on the lens thread. Verify compatibility with your specific Cokin holder model prior to use to ensure correct fit and smooth operation.