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

Canon EF

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

Focal length
300 mm
Aperture
f/6.3
Weight
270 g
Filter diameter
58 mm
Min. focus distance
110 cm
Length
76.1 mm
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At a Glance

Designed for APS-C on Canon EF, this mirror lens offers 300 mm, equivalent to about 480 mm on full frame. It weighs 270 g and is compact. The aperture is fixed at f/6.3, and manual focusing works from 1.1 m. It suits wildlife and birds.

Good for

  • Wildlife
  • Birds

Worth knowing

  • Designed for APS-C: only usable on EOS cameras with an APS-C sensor.
  • No autofocus: focusing is manual only.

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

Technical Specifications

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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
8
Groups
8
Weight
270 g (0.6 lb)
Filter diameter
58 mm
Min. focus distance
110 cm (43.31 in)
Length
76.1 mm (3 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 is made for Canon APS-C cameras, where its field of view equals 480 mm in full-frame terms. It is not meant for full-frame EOS bodies: EF-S lenses do not mount on them at all, and third-party APS-C lenses vignette heavily.

Canon EF cameras

APS-C:
Canon EOS 850D (Rebel T8i),Canon EOS 90D,Canon EOS 250D (Rebel SL3),Canon EOS 4000D (3000D, Rebel T100),Canon EOS 2000D (1500D, Rebel T7),Canon EOS 800D (Rebel T7i),Canon EOS 77D,Canon EOS 200D (Rebel SL2),Canon EOS 80D,Canon EOS 1300D (Rebel T6),Canon EOS 750D (Rebel T6i),Canon EOS 760D (Rebel T6s),Canon EOS 7D Mark II,Canon EOS 1200D (Rebel T5),Canon EOS 70D,Canon EOS 700D (Rebel T5i),Canon EOS 100D (Rebel SL1),Canon EOS 650D (Rebel T4i),Canon EOS 60Da,Canon EOS 600D (Rebel T3i),Canon EOS 1100D (Rebel T3),Canon EOS 550D (Rebel T2i),Canon EOS 60D,Canon EOS 7D,Canon EOS 500D (Rebel T1i),Canon EOS 50D,Canon EOS 450D (Rebel XSi),Canon EOS 1000D (Rebel XS)

With the Canon Mount Adapter EF-EOS R the lens can also be used on Canon RF cameras.

With the Canon Mount Adapter EF-EOS M the lens can also be used on Canon EF-M cameras.

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

Key specs side by side with the most similar Canon EF lenses.

LensSamyang / Rokinon Reflex 300mm F6.3 ED UMC CSNiSi 250mm f/5.6 ReflexCanon EF 300mm f/4.0L IS USMCanon EF 300mm f/2.8L IS II USM
Focal length300 mm250 mm300 mm300 mm
Max. aperturef/6.3f/5.6f/4f/2.8
Weight270 g–1,190 g2,350 g
Filter diameter58 mm62 mm77 mm52 mm
Min. focus distance110 cm200 cm150 cm200 cm
Length76.1 mm–221 mm248 mm
Autofocusnonoyesyes
Image stabilizationnonoyesyes
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Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS: FAQ

Does the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS have autofocus?

No, the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS has no autofocus; you focus it manually.

Does the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS have image stabilization?

No, the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS weigh?

The Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS weighs 270 g. It is 76.1 mm long with a diameter of 64.5 mm.

What filter size does the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS use?

The Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS takes 58 mm screw-in filters.

How close can the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS focus?

The minimum focus distance of the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS is 110 cm, measured from the sensor plane.

Is the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS a full-frame lens?

No, the Samyang / Rokinon Reflex 300mm F6.3 ED UMC CS is an APS-C lens. On APS-C cameras its field of view equals 480 mm in full-frame terms.

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