nikon canon lens adapter

Step-up rings screw onto a lens's smaller filter thread and adapt it to a larger thread size (for example, 34mm to 37mm), allowing you to use larger filters and other threaded accessories.

Product listings mention aluminum and zinc alloy construction as common materials.

They are designed to screw onto the lens and be installed or removed without tools for fast, convenient attachment.

Descriptions note anodized, scratch-resistant external finishes and matte-black interior coatings to reduce reflections.

A step-up ring lets you attach larger-diameter filters and other threaded accessories by converting the lens's thread to a larger size.

The listings explicitly mention Nikon F and Canon EF / EF-S mounts for compatibility.

Descriptions emphasize durable, lightweight aluminum construction and anodized, scratch-resistant external surfaces.