Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS

Focal length: 300 mm
Aperture: f/6.3
Weight: 320 g
Filter diameter: 58 mm
Min. focus distance: 90 cm
Length: 73.7 mm

At a Glance

This 300 mm mirror lens for Canon EF-M gives a full-frame equivalent of 480 mm on APS-C, which means long reach. The aperture is fixed at f/6.3. At 320 g it is compact. Focusing is manual, down to 90 cm. It suits wildlife and bird photography.

Good for

Wildlife
Birds

Worth knowing

No autofocus: focusing is manual only.
Mirror lens: the aperture is fixed, exposure is set via shutter time and ISO.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

Min. focal length: 300 mm
Max. focal length: 300 mm
Max. aperture (min. zoom): f/6.3
Max. aperture (max. zoom): f/6.3
Min. aperture: f/6.3
Elements: 9
Groups: 9
Weight: 320 g (0.71 lb)
Filter diameter: 58 mm
Min. focus distance: 90 cm (35.43 in)
Length: 73.7 mm (2.9 in)
Diameter: 64.5 mm (2.54 in)

Manufacturer data: samyanglens.com

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS fit?

The Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS fits all Canon EF-M cameras. There its field of view equals 480 mm in full-frame terms (crop factor 1.6).

Canon EF-M cameras

APS-C:: Canon EOS M50 Mark II,Canon EOS M6 Mark II,Canon EOS M200,Canon EOS M50,Canon EOS M100,Canon EOS M6,Canon EOS M5,Canon EOS M10,Canon EOS M3,Canon EOS M2,Canon EOS M

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