Samyang 50mm F1.2 AS UMC CS Lens - Micro Four Thirds Mount

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The Samyang 50mm F1.2 AS UMC CS Lens is a manual focus lens for mirrorless cameras with APS-C or smaller sized sensors. Equivalent to a short telephoto lens, equivalent to 75mm on 1.5x crop APS-C sensor or 100mm lens on 2x crop MFT sensor, it is a great lens for close cropped portraits, and other applications requiring a short, fast telephoto lens. With a relatively compact size and weight for such a fast aperture lens results in an easily portable and unobtrusive compact lens, great for candid or low light street photography.

The Samyang 50mm F1.2 is a fully manual lens, with bright f1.2 aperture, together with 9 circular bladed aperture offers beautiful bokeh, and separation of the background with shallow depth of field photography.

This lens features 9 elements in 7 groups including 2 glass aspherical lenses (ASP) to offer high resolution and edge to edge sharpness throughout the image. Ultra Multi Coating (UMC) of Samyang Optics is used to optimize the light transmission and minimizes artefacts such as internal reflections, flare and ghosting.

The solid frame of the lens is made of high-strength aluminium alloy. As the lens is specifically designed for the mirrorless Compact System Cameras (CSC), the Samyang 50mm F1.2 lens is compact and lightweight, weighing less than 390g, making it a very portable lens for such a fast aperture.

  • Glass aspherical lenses (AS)
  • 9 circular aperture blades
  • Ultra Multi Coating (UMC)
  • F1.2 wide apertures


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

9 circular aperture blades
This lens is designed to have 9 circular aperture blades to render beautiful buttery bokeh.

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.

F1.2 wide aperture
Smooth focal control gives you precise adjustment and also F1.2 wide aperture gives you touching photography.


Manufacturer Samyang Optics
Model Samyang 50mm F1.2 AS UMC CS
Lens type Standard prime for full frame or cropped sensors
Focal length 50mm (75mm for APS-C, 100mm for MFT)
Maximum aperture f1.2
Min aperture f22
Angle of view 30.8° (APS-C), 23.6° (MFT)
Min focusing distance 0.5m
No. of diaphragm blades 9
Focus type MF (Manual Focus only)
Lens construction 9 elements, 7 groups (2 Aspheric element)
Dimensions 67.5mm diameter
Weight 385g (approx. dependant on mount)
Lens hood Detachable, included
Filter size 62mm