Lens adapter Massa SB900 — reduction from 25 mm to 37 mm, silver

The Massa SB900 lens adapter reduces a 25 mm thread to a 37 mm thread in a silver finish. It is designed to enable mounting 37 mm filters and accessories on lenses or devices that have a 25 mm female/male thread, providing a straightforward mechanical connection for photography and videography. The adapter maintains alignment between the accessory and the optical axis while preserving a compact profile and a neutral appearance.

Advantages

The Massa SB900 adapter offers a durable and lightweight connection that expands compatibility between accessories of different thread sizes. Its silver finish resists corrosion and blends with many camera setups. The adapter is simple to attach and remove without tools, allowing quick swaps between filters or other 37 mm threaded accessories. It provides a low-profile solution that minimizes added bulk and helps maintain balance on small lenses or devices.

Suitable for

• Attaching 37 mm screw-on filters to lenses or devices with a 25 mm thread
• Mounting 37 mm step-up or step-down accessories such as lens caps, hoods, or converters
• Adapting small optics or extension tubes in compact photography setups
• Connecting third-party photographic or video accessories with 37 mm fittings

Key specifications

• Function: thread size reduction from 25 mm to 37 mm
• Material: metal construction (silver finish)
• Finish: silver-coloured surface treatment
• Form factor: low-profile ring adapter for screw-on accessories
• Compatibility: fits devices with a 25 mm external or internal thread to accept 37 mm screw-on items

How to use

Screw the Massa SB900 adapter onto the device or lens with the matching 25 mm thread until it sits securely but without excessive force. Then, attach the 37 mm accessory by screwing it onto the adapter’s 37 mm thread in a clockwise direction until snug. To remove, reverse the process: unscrew the accessory first, then the adapter. Avoid cross-threading by aligning threads carefully before applying pressure.

Usage recommendations

Check thread orientation and fit before full tightening. If the adapter feels loose or does not seat properly, inspect both threads for damage or debris. Use finger torque for attachment; avoid tools that may deform the adapter. Store the adapter in a dry place to preserve the silver finish.