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

Sony E

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
73.8 mm
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At a Glance

With 300 mm for Sony E, this mirror lens is an APS-C design reaching about 450 mm in full-frame terms. At 320 g it is compact. Its f/6.3 aperture cannot be changed, and focus is set by hand, down to 90 cm. It suits wildlife and bird photography.

Good for

  • Wildlife
  • Birds

Worth knowing

  • APS-C image circle: on full-frame cameras only usable in crop mode, at reduced resolution.
  • 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
9
Groups
9
Weight
320 g (0.71 lb)
Filter diameter
58 mm
Min. focus distance
90 cm (35.43 in)
Length
73.8 mm (2.91 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 designed for APS-C sensors. On APS-C Sony E-Mount cameras its field of view equals 450 mm in full-frame terms. Full-frame bodies use it in APS-C (crop) mode, recording only part of the sensor and fewer megapixels.

Sony E-Mount cameras

Full frame (in APS-C mode):
Sony A7R VI,Sony A7 V,Sony FX2,Sony A1 II,Sony A9 III,Sony A7C II,Sony A7CR,Sony ZV-E1,Sony A7R V,Sony A7 IV,Sony A1,Sony FX3,Sony A7S III,Sony A7C,Sony FX6,Sony A7R IV (A7R IVA),Sony A9 II,Sony FX9,Sony A7 III,Sony A7R III (A7R IIIA),Sony A9,Sony A7R II,Sony A7S II,Sony A7 II,Sony A7S,Sony A7,Sony A7R
APS-C:
Sony ZV-E10 II,Sony A6700,Sony FX30,Sony ZV-E10,Sony A6600,Sony A6100,Sony A6400,Sony A6500,Sony A6300,Sony QX1 (ILCE-QX1),Sony A6000,Sony A5100,Sony A3500,Sony A5000,Sony A3000,Sony NEX-5T,Sony NEX-3N,Sony NEX-6,Sony NEX-5R,Sony NEX-F3,Sony NEX-7,Sony NEX-5N,Sony NEX-C3,Sony NEX-5,Sony NEX-3

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

Key specs side by side with the most similar Sony E-Mount lenses.

LensSamyang / Rokinon Reflex 300mm F6.3 ED UMC CSNiSi 250mm f/5.6 ReflexSony FE 300mm F2.8 GM OSSTokina SZX Super Tele 400mm F8 Reflex MF
Focal length300 mm250 mm300 mm400 mm
Max. aperturef/6.3f/5.6f/2.8f/8
Weight320 g–1,470 g355 g
Filter diameter58 mm62 mm40.5 mm67 mm
Min. focus distance90 cm200 cm200 cm115 cm
Length73.8 mm–265 mm77 mm
Autofocusnonoyesno
Image stabilizationnonoyesno
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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 320 g. It is 73.8 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 90 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 450 mm in full-frame terms.

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