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

Nikon F (DX/FX)

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

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

Built for the Nikon F-mount, this APS-C mirror lens offers 300 mm, equivalent to about 450 mm on full frame. It is compact at 260 g. The aperture is fixed at f/6.3, and focusing is manual from 1.1 m. 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
8
Groups
8
Weight
260 g (0.57 lb)
Filter diameter
58 mm
Min. focus distance
110 cm (43.31 in)
Length
73.6 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 is designed for APS-C sensors. On APS-C Nikon F-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.

Nikon F-Mount cameras

Full frame (in APS-C mode):
Nikon D6,Nikon D780,Nikon D850,Nikon D5,Nikon D810A,Nikon D4S,Nikon D810,Nikon D750,Nikon Df,Nikon D610,Nikon D4,Nikon D800,Nikon D800E,Nikon D600,Nikon D3S,Nikon D3X,Nikon D700
APS-C:
Nikon D3500,Nikon D7500,Nikon D500,Nikon D3400,Nikon D5600,Nikon D5500,Nikon D7200,Nikon D3300,Nikon D7100,Nikon D5300,Nikon D3200,Nikon D5200,Nikon D5100,Nikon D7000,Nikon D3100,Nikon D300S,Nikon D5000,Nikon D3000,Nikon D90,Nikon D60

With the Nikon FTZ II / FTZ the lens can also be used on Nikon Z (DX/FX) cameras.

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

Key specs side by side with the most similar Nikon F-Mount lenses.

LensSamyang / Rokinon Reflex 300mm F6.3 ED UMC CSNiSi 250mm f/5.6 ReflexNikkor AF-S 300mm f/4E PF ED VRNikon AF-S Nikkor 300mm f/4D ED-IF
Focal length300 mm250 mm300 mm300 mm
Max. aperturef/6.3f/5.6f/4f/4
Weight260 g–755 g1,440 g
Filter diameter58 mm62 mm77 mm77 mm
Min. focus distance110 cm200 cm140 cm145 cm
Length73.6 mm–147.5 mm222.5 mm
Autofocusnonoyesyes
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 260 g. It is 73.6 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 450 mm in full-frame terms.

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