Samyang 300mm F6.3 ED UMC CS Reflex Mirror Lens - Sony E Mount - Silver

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The Samyang 300mm F6.3 ED UMC CS Reflex Mirror Lens is a compact reflex mirror lens dedicated for mirrorless compact system cameras.

The Samyang 300mm is aesthetically designed, and a compact lens for ease of carrying and use. The optical structure contains 9 elements arranged in 6 groups, including one ED-type lens to provide high contrast and reducing chromatic aberration. UMC Multicoated optics help reduce ghosting and flare.

Its a very compact design with dimensions of 73.7 x 64.5 mm and weighing approximately 320g, makes it ideal for a long telephoto lens for compact system / interchangeable mirrorless cameras.

The Samyang 300mm Reflex Mirror Lens is a manual lens with smooth manual focusing. Due to the very narrow depth of field with such a long focal length it is recommended to focus with live-view to achieve accurate focus where possible. As with all long telephoto lenses a combination of sturdy camera support / substantial tripod, good technique, fast shutter speed, and use of remote / mirror lock up is recommended to avoid camera shake to achieve the best results.

  • Reflex Mirror lens
  • Glass aspherical lenses (AS)
  • Extra-low Dispersion element (ED)
  • Ultra Multi Coating (UMC)
  • Fixed F6.3 Aperture


Glass aspherical lenses
The adaption glass aspherical lenses reproduce aberration to get high quality image in centre and edge of frame and excellent contrast.

Extra-low Dispersion lens
Used for mirrorless mount lens to lower unnecessary light dispersion to effectively drop colour aberration.

Reflex Mirror lens
It is a reflex mirror lens with a relatively compact size in such focal length.

Ultra Multi Coating (UMC)
Samyang applies the UMC (Ultra Multi Coating) of their own technology to reduce flare and ghost as much as possible and get clear and fresh colour image.


Manufacturer Samyang Optics
Model 300mm F6.3 ED UMC CS Reflex Mirror
Lens type Telephoto lens
Focal length 300mm
Maximum aperture f6.3 fixed
Angle of view 5.5°
Min focusing distance 0.9m
Focus type MF (Manual Focus only)
Lens construction 9 elements, 6 groups (1 ED element)
Dimensions 64.5mm diameter
Weight 318g (approx. dependant on mount)
Lens hood Detachable, included
Filter size 58mm (front), 25.5mm (rear)