Rokinon / Samyang AF 45mm F1.8 FE lens for Sony mirrorless cameras is “tiny but premium”

Samyang AF 45mm F1.8 FE

Independent lens maker Samyang (branded Rokinon in the US) is carving a solid reputation for reliable low-cost lenses, and the new Samyang AF 45mm F1.8 FE is an extremely affordable general purpose lens for cameras like the Sony A7 III and A7R III. 

Not only that, it’s light too (just 162g), compact and much more affordable than Sony’s own prime lenses, especially the G Master series – some of the best Sony lenses are also some of the biggest!

With a focal length of 45mm, the Samyang AF 45mm F1.8 FE is close to the classic all-purpose 50mm focal length, which is reckoned to offer the closest thing to the human eye’s natural angle of view. Samyang says it’s particularly well suited to travel, thanks to its small size and weight, and it has a minimum focus distance of 0.45m, so it should be good for moderate close-up shots too.

Samyang AF 45mm F1.8 FE

The Samyang AF 45mm F1.8 FE has a wide f/1.8 maximum aperture and a rounded 9-blade diaphragm mechanism for smooth bokeh and background blur.

Beautiful background blur

The f/1.8 maximum aperture is this lens’s other big selling point. This allows faster shutter speeds in low light and attractive background blur at wide apertures. Samyang has used a rounded 9-blade diaphragm mechanism to produce attractive bokeh in blurred areas.

The company also paid special attention to the optical performance, claiming a new design optimised for high resolution mirrorless cameras, which consists of 7 elements in 6 groups – these include two aspherical lenses and one extra-low dispersion element. Samyang claims this design means vignetting (corner shading), distortion and chromatic aberration (colour fringing) are kept well under control.

Samyang AF 45mm F1.8 FE

This is Samyang's 7th autofocus lens for Sony's FE mount full frame mirrorless cameras.

One of the key features for Sony owners will be that this is an autofocus lens. Many third-party prime lenses are manual focus only, but Samyang has steadily been stepping up its autofocus lens range to compete head-on with Sony’s own lenses.

The Rokinon / Samyang AF 45mm F1.8 FE is on sale from the end of May 2019 and will cost $399 / £349.99.

Read more:

• Choosing the best Sony camera: from point and shoot Cyber-shots to high-end Alphas
• Which is the best mirrorless camera? We help you choose

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Rod Lawton

Rod is an independent photography journalist and editor, and a long-standing Digital Camera World contributor, having previously worked as DCW's Group Reviews editor. Before that he has been technique editor on N-Photo, Head of Testing for the photography division and Camera Channel editor on TechRadar, as well as contributing to many other publications. He has been writing about photography technique, photo editing and digital cameras since they first appeared, and before that began his career writing about film photography. He has used and reviewed practically every interchangeable lens camera launched in the past 20 years, from entry-level DSLRs to medium format cameras, together with lenses, tripods, gimbals, light meters, camera bags and more. Rod has his own camera gear blog at but also writes about photo-editing applications and techniques at