A sleek and versatile prime, the Sony E-mount AF 45mm f/1.8 FE from Samyang is a normal-length prime characterized by its compact design and bright f/1.8 maximum aperture. The optical design incorporates a pair of aspherical elements and one extra-low dispersion element, which help to suppress spherical and chromatic aberrations for improved sharpness, color accuracy, and clarity. An Ultra Multi-Coating has also been applied to reduce flare and ghosting in order to achieve higher contrast when working in strong lighting conditions. Additionally, the lens's linear STM autofocus motor works in conjunction with Sony cameras' AF systems for quick, quiet, and precise focusing performance, and manual focus override is also available for more refined control.
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Key Features
- E-Mount Lens/Full-Frame Format
- Aperture Range: f/1.8 to f/22
- One Extra-Low Dispersion Element
- Two Aspherical Elements
A sleek and versatile prime, the Sony E-mount AF 45mm f/1.8 FE from Samyang is a normal-length prime characterized by its compact design and bright f/1.8 maximum aperture. The optical design incorporates a pair of aspherical elements and one extra-low dispersion element, which help to suppress spherical and chromatic aberrations for improved sharpness, color accuracy, and clarity. An Ultra Multi-Coating has also been applied to reduce flare and ghosting in order to achieve higher contrast when working in strong lighting conditions. Additionally, the lens's linear STM autofocus motor works in conjunction with Sony cameras' AF systems for quick, quiet, and precise focusing performance, and manual focus override is also available for more refined control.
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Samyang AF 45mm f/1.8 Overview
Compact normal-length prime is designed for full-frame Sony E-mount mirrorless cameras, however can also be used with APS-C models where it provides a 67.5mm equivalent focal length.
Bright f/1.8 maximum aperture suits working in difficult lighting conditions and also offers increased control over depth of field for isolating subjects and working with selective focus.
One extra-low dispersion element reduces color fringing and chromatic aberrations in order to produce greater clarity and color rendering.
Two aspherical elements control spherical aberrations and distortions for improved sharpness and resolution.
An Ultra Multi-Coating has been applied to individual elements in order to reduce flare and ghosting for increased contrast and a neutral color balance.
The integrated linear STM autofocus motor works in conjunction with Sony cameras' focusing systems for quick, quiet, and precise AF control. Manual focus override is also available for refining your focus position.
Internal focusing design maintains the overall lens length and prevents the front of the lens from rotating during use.
Rounded nine-blade diaphragm contributes to a smooth and pleasing bokeh quality.
UPC: 084438766202
Samyang AF 45mm f/1.8 Specs
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Samyang AF 45mm f/1.8 Reviews
Samyang vs Sony 45mm f2.5 fe g
By Marc
Rated 5 out of 5
Date: 2026-02-01
The major competitor for this lens is the Sony 40mm FE G. The Sony is better built (metal, not plastic), perhaps better optically and weather proof. On the other hand, the Samyang is way cheaper, built well, good optically, has a smaller f number (1.8 vs 2.5) and is slightly smaller and lighter. The 40mm is closer to 35mm and the 45mm is closer to a nifty fifty. The Samyang may be better for portraits and the Sony may be better for street shots. Both are great lenses. It depends on what you want.
Great Lens For The Size, Weight & Price
By Bilbo
Rated 5 out of 5
Date: 2024-06-05
This is one of the lightest lenses on the Sony Full frame system. It feels a bit plastic and may not be a G Master but it's a really versatile focal length, has a large maximum aperture and is a great option for travel, street, portraiture or if you have a smaller body like the Sony A7C. Sharing some of the shots I took in. Penang, Malaysia.
See any errors on this page?
How do you compare this 35mm f/1.8 version of ...
How do you compare this 35mm f/1.8 version of this lens?
The Samyang AF 45mm f/1.8 FE Lens for Sony E will produce the same image quality and has the same focus speed as the Samyang AF 35mm f/1.8 FE Lens for Sony E.
Date published: 2024-03-28
Has anyone purchased this lens recently (Oct ...
Has anyone purchased this lens recently (Oct 2021)? What firmware does it come with now?
I've recently checked one and it's version 1. I would just update it if you decide to buy this lens.
Date published: 2022-10-11
What version of the firmware does this come with ...
What version of the firmware does this come with in 2021?
I just received my lens (July 22, 2022) and it still has version 2 software on it. Version 2 was released on July 8, 2019 (more than 3 years ago). The curent version is version 6, which was released Sept 29, 2021. Either B&H is elling 3-year-old inventory or Samsung is trying to get us all to buy their Lens Station. Disappointed.
Date published: 2022-10-22
Does this lens allow manual focus as well?
Does this lens allow manual focus as well?
Yes. The lens offers manual focus override.
Date published: 2021-12-27
Is this new or refurbished?
Is this new or refurbished?
This is a brand new lens from Samyang.
Date published: 2020-09-17
What's the difference between this and Rokinon 45m
What's the difference between this and Rokinon 45mm 1.8?
The Samyang AF 45mm f/1.8 FE Lens is the same exact lens as the Rokinon AF 45mm f/1.8 FE Lens except for the brand name. They are made in the same factory under both names.
Date published: 2026-03-29
What is the outer diameter?
What is the outer diameter?
The outer diameter is 62mm.
Date published: 2026-03-25
Is this lens weather sealed?
Is this lens weather sealed?
No, this lens does not have weather sealing.
Date published: 2020-07-22