Lens Step-Up/Step-Down Adapter Marumi 30mm to 46mm Thread

The Marumi 30mm to 46mm thread adapter provides a simple mechanical solution for connecting accessories with different screw thread diameters. Manufactured from metal, the adapter allows mounting of 46mm filters, lens attachments or other screw-on accessories onto optics with a 30mm thread, and can be used in the opposite direction where physical fit permits. The product is intended for photographers and videographers who require a reliable, low-profile connection between threaded components.

Advantages

The metal construction delivers stable, durable coupling that resists wear during repeated mounting and removal. Its precise threading ensures secure attachment with minimal play, preserving alignment between lens and accessory. The compact, lightweight design adds negligible bulk to the optical assembly while enabling the use of a wider range of filters and attachments without modifying the lens.

Suitable for

• Attaching 46mm screw-on filters to lenses or accessories with a 30mm filter thread
• Connecting threaded lens accessories such as step filters, close-up lenses or converters where threads are compatible
• Temporary adaptations in mixed-equipment photography and videography setups

Key specifications

• Material: metal construction for mechanical stability
• Input thread diameter: 30 mm (female or male as defined by accessory orientation)
• Output thread diameter: 46 mm (female or male as defined by accessory orientation)
• Finish: machined threading for precise fit
• Form factor: low-profile, lightweight adapter ring

How to use

Align the adapter threads with the accessory and lens threads and screw by hand until snug. Avoid cross-threading by ensuring correct alignment before applying pressure. Tighten only until secure; do not overtighten. To reverse the configuration, mount the adapter on the accessory first and then attach the lens or other component, observing the same precautions. Inspect the threads periodically for dirt or damage and clean with a soft brush or cloth as needed.

Usage recommendations

Use the adapter for static, mechanical connections; it is not a replacement for optical elements. For best results, verify physical clearance and vignetting on wide-angle lenses when using filters or attachments through this adapter. Store in a dry place to prevent corrosion and keep threads clean to maintain a reliable connection.