SAMYANG 45mm F1.8 AF

Compact standard prime lens for full-frame mirrorless cameras

The Samyang AF 45mm F1.8 FE is a compact prime lens designed for Sony E-mount full-frame mirrorless cameras. Its 45mm focal length provides a natural-looking perspective that works well for everyday photography, portraits, street scenes, travel, lifestyle images and documentary-style shooting. The angle of view offers a useful balance between including the surroundings and keeping attention on the main subject. With its lightweight design and bright maximum aperture, the lens is suitable for photographers who want a versatile everyday option that can remain mounted on the camera for extended periods.

Bright F1.8 aperture for creative control

The maximum F1.8 aperture allows the lens to gather substantial light in indoor environments, during evening photography and in other low-light situations. It also enables shallow depth-of-field effects, helping subjects stand out against a softly blurred background. This is particularly useful for portraits, photographs of children and pets, lifestyle images and detail shots. The aperture can be stopped down to F22 when greater depth of field is required, giving photographers flexibility to adapt exposure and sharpness to different subjects and lighting conditions.

Optical design for clarity and contrast

The optical construction uses specialised glass elements to help control aberrations and maintain image quality. The design incorporates aspherical elements and an extra-low-dispersion element, which help reduce distortion, chromatic aberration and other optical imperfections. Samyang’s Ultra Multi-Coating (UMC) is designed to minimise unwanted reflections and flare, supporting contrast and colour reproduction when working with bright light sources. These optical features help produce detailed images suitable for portraits, everyday photography and high-resolution digital camera sensors.

Fast and quiet linear autofocus

The lens features a linear stepping motor autofocus system designed for accurate, smooth and quiet focusing. It works with compatible Sony E-mount camera autofocus functions, with available subject recognition and tracking capabilities depending on the camera model and settings. The internal focusing design helps keep the lens’s external length consistent during focusing, making handling more convenient. Quiet autofocus is also beneficial for video recording, interviews and documentary work, where focusing noise may otherwise be picked up by a microphone.

Natural perspective for portraits and everyday photography

The 45mm focal length offers a field of view close to a natural, familiar perspective, making it suitable for a broad range of subjects without the pronounced wide-angle effect of shorter lenses. It can be used for environmental portraits, candid moments, street photography, travel scenes and general-purpose shooting. On a full-frame camera, the focal length provides enough room to include contextual details while maintaining emphasis on the subject. When mounted on an APS-C Sony camera, the angle of view becomes narrower, equivalent to approximately 67.5mm on a full-frame camera.

Close focusing and pleasing background rendering

The minimum focusing distance is approximately 0.45 m, with a maximum magnification ratio of 0.12×. This allows the lens to capture moderately close subjects such as food, accessories, flowers and everyday objects, although it is not intended as a dedicated macro lens. Its nine-blade diaphragm contributes to smooth out-of-focus rendering when shooting with a wide aperture. The combination of close focusing and background separation makes it useful for detail-oriented compositions while preserving a natural-looking perspective.

Lightweight construction and convenient filter compatibility

The lens measures approximately 56.1 mm in length, has a maximum diameter of 61.8 mm and weighs around 162 g without the hood and front cap. Its 49 mm filter thread supports widely available filters, including polarising and neutral-density filters for creative exposure control. The compact, lightweight body is convenient for travel and everyday carry, particularly when paired with a small Sony mirrorless camera. With its Sony FE mount, bright aperture and quiet autofocus, the lens is a practical choice for portraits, street photography, travel, lifestyle content and general-purpose shooting.

• Samyang AF 45mm F1.8 FE Lens
• Lens Hood
• Front Lens Cap (49 mm)
• Rear Lens Cap