Filter adapter Massa for Cokin system — 49 mm thread (SB613)

The Massa filter adapter SB613 allows photographers to mount lenses with a 49 mm front thread into the Cokin modular filter holder system. It provides a secure mechanical connection between a round-threaded lens and Cokin square or rectangular filters, enabling the use of graduated, neutral density, and creative filters with compact lenses and converters that have a 49 mm thread.

Advantages

This adapter converts a 49 mm lens thread to the Cokin holder interface without altering optical alignment. It is lightweight and designed for straightforward installation, providing stable support for the filter holder while keeping access to the lens controls. The adapter is compatible with a wide range of lenses that use the 49 mm thread, allowing photographers to expand creative control over exposure and color balance using Cokin-style filters.

Suitable for

• Landscape photography with graduated neutral density filters
• Architectural photography requiring control of highlights and shadows
• Long-exposure photography when using neutral density filters
• Creative color or effect filters in Cokin square/rectangular formats

Key specifications

• Front thread size: 49 mm
• Mount type: adapter for Cokin modular filter holder
• Material: lightweight metal or alloy construction for stability (as specified by manufacturer)
• Compatibility: lenses with 49 mm front thread and Cokin filter holders
• Finish: matte surface to reduce reflections (as specified by manufacturer)

How to use

Screw the Massa adapter onto the lens front by turning it clockwise until it is hand-tight and properly seated. Attach the Cokin filter holder onto the adapter according to the holder’s mounting procedure, ensuring the holder is aligned and secured. Insert the desired Cokin filters into the holder slots and adjust their vertical or rotational position as required for the shot. Confirm that the assembly does not vignette at the chosen focal length and that lens controls remain accessible.

Usage recommendations

Use the adapter on lenses designed for front-thread accessories and check for vignetting when using wide-angle lenses. Tighten by hand to avoid cross-threading; avoid overtightening. When using heavy filter stacks, support the holder to reduce strain on the lens mount. Store the adapter in a protective case when not in use to prevent dirt and damage.