Product Description

The INON S-MRS Zoom Ring RF15-30 is a dedicated magnetic zoom-control accessory designed specifically for the Canon RF15-30mm F4.5-6.3 IS STM lens. Installed on the lens and used with the compatible INON MRS EXT. Ring 54, it enables smooth underwater zoom operation through INON's S-MRS (Smart Magnetic Rotary System).

The S-MRS system transfers rotational movement magnetically between the lens-mounted zoom ring and the control ring inside the MRS extension ring, eliminating the need for conventional mechanical gears. INON designed this system to provide smooth, precise operation with reduced play and rattle, making it ideal for underwater photographers who want reliable focal length adjustment while diving.

Key Benefits

• Designed for Canon RF15-30mm F4.5-6.3 IS STM
  Purpose-built specifically for the zoom ring of the Canon RF15-30mm F4.5-6.3 IS STM lens.
• Magnetic Zoom Operation
  Uses INON's S-MRS magnetic coupling system to transfer zoom movement without mechanical gears.
• Compatible with MRS EXT. Ring 54
  Engineered exclusively for use with the INON MRS EXT. Ring 54.
• Smooth & Precise Control
  Optimized magnetic attraction helps provide responsive zoom operation while minimizing play and rattle.
• Supports Wide-Angle Photography
  Allows easy adjustment throughout the lens's 15–30 mm zoom range for reefs, wrecks, large marine life, and scenic underwater compositions.
• Genuine INON Quality
  Designed and manufactured by INON for precise fit and dependable underwater performance.

Who It's For

• Underwater photographers
• Underwater videographers
• Canon RF15-30mm F4.5-6.3 IS STM users
• Owners of compatible INON X-2 underwater housings
• Photographers using the INON MRS EXT. Ring 54 system

What's Included

• INON S-MRS Zoom Ring RF15-30

Key Specifications

• Product Type: Magnetic Zoom Control Ring
• Compatible Lens: Canon RF15-30mm F4.5-6.3 IS STM
• Controlled Function: Zoom
• Compatible Extension Ring: INON MRS EXT. Ring 54
• Control Method: S-MRS magnetic rotary coupling
• Weight in Air: 20 g (0.7 oz.)
• Compatibility: Designed for compatible INON X-2 housing and port configurations using the Canon RF15-30mm F4.5-6.3 IS STM

FAQ

What does the S-MRS Zoom Ring RF15-30 do?
It allows underwater operation of the zoom ring on the Canon RF15-30mm F4.5-6.3 IS STM through INON's S-MRS magnetic control system.

Which extension ring is it compatible with?
It is designed specifically for the INON MRS EXT. Ring 54.

Does this control focus?
No. This accessory controls zoom only. Focus/control-ring operation requires the separate INON S-MRS Focus Ring RF15-30.

Can I use it with another Canon RF lens?
No. It is specifically designed for the Canon RF15-30mm F4.5-6.3 IS STM lens.

Does this include the extension ring or housing?
No. This listing includes the S-MRS Zoom Ring RF15-30 only. The MRS EXT. Ring 54, housing, port, camera, and lens are sold separately.

Is this a genuine INON product?
Yes. The S-MRS Zoom Ring RF15-30 is an authentic INON accessory designed for compatible S-MRS underwater housing configurations.