Canon 1257B002

Overview

The Canon 1257B002 is a 50mm prime lens designed to deliver exceptional image quality and creative flexibility for photographers seeking sharp, vibrant photos in various lighting conditions. Its wide f/1.2 aperture excels in low-light environments and allows for a shallow depth of field, making it easier to isolate subjects with smooth background blur. This lens is ideal for portraiture, event photography, and everyday shooting where clarity and artistic expression are essential.

Part of Canon’s professional L-series, the lens features a robust, weather-sealed construction that protects against dust and moisture, ensuring reliable performance in challenging settings. The optical design incorporates an aspherical element to reduce distortion and aberrations, while the Super Spectra coating minimizes flare and ghosting for accurate colors and sharp images. Autofocus is fast and quiet thanks to the ring-type Ultrasonic Motor, with full-time manual focus override for precise control.

Compatible with full-frame cameras and providing an 80mm equivalent focal length on APS-C models, this lens offers versatility across different camera bodies. Its rounded 8-blade diaphragm produces pleasing, natural-looking bokeh, enhancing the aesthetic quality of your photos. Despite its professional-grade features, the lens remains lightweight at 1.28 lb (580 g), making it easy to carry and handle during extended shoots.

Key features

• 50mm focal length suitable for a wide range of photography styles, from portraits to everyday scenes
• Bright f/1.2 aperture enables excellent low-light performance and creative control over depth of field
• Aspherical lens element reduces distortion and optical aberrations for clearer images
• Super Spectra coating minimizes flare and ghosting, improving color accuracy and contrast
• Durable, weather-sealed L-series construction protects against dust and moisture for use in tough conditions
• Ring-type Ultrasonic Motor (USM) delivers fast, quiet autofocus with full-time manual focus override
• Rounded 8-blade diaphragm creates smooth and natural background blur to enhance subject separation
• Lightweight design supports comfortable handling and portability during long shooting sessions

Key specs

• Focal length: 50mm
• Maximum aperture: f/1.2
• Lens construction: includes aspherical element
• Diaphragm blades: 8, rounded
• Autofocus motor: ring-type Ultrasonic Motor (USM)
• Weight: 1.28 lb (580 g)
• Compatibility: full-frame cameras; 80mm equivalent focal length on APS-C sensors
• Weather sealing: dust and moisture resistant

Connectivity and compatibility

This lens is designed to work seamlessly with Canon’s full-frame DSLR cameras, providing native 50mm focal length performance. When mounted on APS-C sensor cameras, it offers an effective focal length of approximately 80mm, making it versatile for different shooting styles and camera bodies. Its autofocus system integrates smoothly with Canon camera bodies for quick and quiet focusing, while full-time manual focus override allows precise adjustments without switching modes.

Ideal uses and environments

The Canon 1257B002 lens is well suited for photographers who prioritize image quality and creative control in portrait, event, and low-light photography. Its wide aperture and sharp optics make it a strong choice for capturing subjects with beautiful background separation and accurate color reproduction. The weather-sealed design ensures it performs reliably outdoors or in challenging environments, while its manageable weight supports comfortable use during extended shoots.

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