Camera filter set Massa COKIN 2-in-1 77mm – filter holder adapter and square filter compatible

The Massa COKIN 2-in-1 77mm filter set combines a 77mm adapter ring with a COKIN-style square filter holder interface, enabling photographers to use rectangular and square creative or neutral density filters on lenses with 77mm front threads. The system provides a stable mounting point for graduated, solid and creative filters, simplifying transitions between screw-in circular filters and slot-style filter systems. The kit is intended to expand creative control over exposure, color balance and graduated effects in landscape, architecture and long-exposure photography.

Advantages

The 2-in-1 design eliminates the need for separate circular and holder systems by providing a 77mm threaded adapter that mates with COKIN-compatible square filters. It supports precise placement of graduated filters and easy stacking of neutral density or color-correction filters in the holder. The adapter ring ensures secure attachment to lenses with 77mm threads while maintaining compatibility with a wide range of COKIN-style filter sheets and accessories. This approach increases workflow flexibility and reduces the number of separate filter accessories needed.

Suitable for

• Landscape photography requiring graduated neutral density or color grad filters
• Architectural and cityscape photography to control sky exposure and reflections
• Long-exposure photography where solid neutral density filters are needed
• Creative photography using color, split or special-effect rectangular filters

Key specifications

• Mount type: 77mm threaded adapter compatible with COKIN-style square filter holders
• Material: metal adapter with filter holder interface (compatible with standard COKIN filter sheets)
• Compatibility: designed for lenses with 77mm front thread diameter and COKIN-style filter sheets and holders
• Supported filter format: rectangular/square sheet filters (COKIN-style)
• Use cases: graduated ND, solid ND, color correction and creative filters

How to use

Screw the 77mm adapter ring onto the front threads of a compatible lens until it is firmly seated. Attach the COKIN-style holder to the adapter interface according to the holder’s mounting method, then slide the selected square or rectangular filter sheets into the holder slots. Adjust the vertical position of graduated filters to align transitions with the horizon or subject, and combine filters as needed to achieve the desired exposure and color effect. Remove and store filters in protective sleeves when not in use to prevent scratching and dust.

Usage recommendations

For best results, use high-quality COKIN-style filter sheets sized for the holder and clean both lens and filters before mounting. When shooting landscapes, start with graduated neutral density filters to balance bright skies with darker foregrounds; for long exposures, use solid neutral density sheets rated appropriately for the desired shutter speed. Check for vignetting when combining multiple filters, especially on wide-angle lenses, and re-tighten the adapter ring periodically to ensure a secure fit.