Samyang AF 45mm f/1.8 Sony FE

Samyang AF 45mm f/1.8 Sony FE – Compact, fast autofocus for Sony E-mount

The Samyang AF 45mm f/1.8 FE is a compact, fast and sharp autofocus lens made for Sony's mirrorless cameras with the E-mount. It weighs only 162 grams, which makes it easy to carry and integrate into a lightweight photo kit without sacrificing optical quality or key functionality.

Compact design and compatibility

This lens is designed for full-frame sensors (24x36mm) and fits Sony FE cameras. At the same time, you can mount it on Sony's APS-C bodies, such as the A6xxx series. On APS-C cameras the 45mm focal length functions as a short telephoto, which many photographers prefer for portrait work.

Who and what it’s good for

The 45mm focal length suits a wide range of subjects. Photographers use it for children, street scenes, travel, landscapes and documentary photography. On APS-C bodies it becomes especially useful for portraits because the effective field of view tightens into a short telephoto perspective. In short, the lens covers everyday photography as well as more intimate portrait work.

Autofocus, aperture and close focusing

The autofocus motor in the Samyang AF 45mm f/1.8 FE works quickly, accurately and quietly. This combination, together with the fast f/1.8 aperture, makes the lens well suited to discreet situations such as weddings and ceremonies where shutter noise and flash use can be disruptive.

The lens features a nine-blade rounded aperture that helps produce soft and pleasing bokeh. It also focuses as close as 45 cm, allowing you to capture smaller details that add variety and interest to a photo story.

Optical construction and image characteristics

Samyang has designed the 45mm f/1.8 FE with optical quality in mind despite its small size. The construction consists of 7 elements in 6 groups. Two aspherical elements and one ED (Extra-low Dispersion) element work to reduce optical errors and preserve sharpness, even at wide apertures.

The lens also uses Samyang’s Ultra Multi Coating to maintain contrast and image brilliance under challenging lighting. Additionally, users note that this Samyang lens imparts a subtle warmth to images, which many photographers find desirable for natural skin tones and inviting color rendition.

Important features

• Compact 45mm lens with Sony FE / E mount
• Fast aperture (f/1.8) with 9 rounded aperture blades
• Full-frame compatible but can also be used with APS-C
• Fast and silent autofocus
• High quality optical construction with aspherical elements and ED glass
• Soft and beautiful bokeh

Specifications

FAQ

question: Can I use this lens on both full-frame and APS-C Sony cameras?
Answer: Yes. The Samyang AF 45mm f/1.8 FE is full-frame compatible and also performs on APS-C bodies, where the focal length acts as a short telephoto well suited to portrait photography.

question: Is the autofocus quiet enough for events like weddings?
Answer: Yes. The autofocus motor is described as fast, accurate and quiet, which helps keep shooting discreet in ceremonies and similar situations.

question: How close can this lens focus for detail shots?
Answer: The lens can focus down to 45 cm, enabling you to capture close-up details to complement wider documentary images.

question: What optical features help image quality at wide apertures?
Answer: The lens includes two aspherical elements and one ED element within a 7-element, 6-group design, and uses Ultra Multi Coating to reduce aberrations and preserve contrast and sharpness, even at larger apertures.