Canon RF 55mm f/1.8 STM (Rumor) - Lens specs

Note: the image may come from leaked material, be an AI recreation, or be a simple placeholder. Therefore, the final appearance of the lens may vary.

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Canon RF Prime full-frame 2026

Autofocus

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Compare with

55mm

Focal length

f/1.8

Max aperture

14mm35mm85mm200mm600mm

▲ 55mm

Max aperture

f/1.4

f/1.8

f/2.8

Constant Aperture

Aperturef/1.8

f/1.8f/16

Near focus9' 4"

Far focus10' 3"

Total DOF1' 0"

Hyperfocal191' 4"

Subject distance9' 9"

Focal length55 mm

Aperturef/1.8

SensorFull Frame

Illustrative scene preview based on this lens's focal length, aperture, and sensor coverage.

This preview uses 55mm, f/1.8, and Full Frame. Subject distance is estimated to keep lens previews comparable.

Minimum focus distance is missing in the current record, so the preview uses a generic safe subject distance.

Min aperture: f/16

Focusing

AF motor: STM

Physical

Dimensions: 78.5mm
Color: Black

Recommended Use

Ideal for: Portraits, Street, Travel, Walkaround / Daily, Weddings

Release year: 2026

The best

Compact design with f/1.8 aperture based on JPO patent 2026-059152.

Also

Mid-range STM lens optimized for the Canon RF system.

Summary

The Canon RF 55mm f/1.8 STM is a rumored lens for the EOS R Canon system, based on the recent patent JPO 2026-059152. It is positioned as a compact design with high optical quality, surpassing the current 50mm f/1.8 in complexity and optimized to cover the entire sensor without aggressive digital corrections.

Note: Being a rumor based on patents, the final specifications may vary from the initial optical design.