Yongnuo YN 17mm f/1.7M Lens (Micro Four Thirds)

Overview

The Yongnuo YN 17mm f/1.7M Lens (Micro Four Thirds) is a wide-angle prime designed for Micro Four Thirds mirrorless cameras, making it ideal for street, landscape, and everyday photography. With a bright f/1.7 maximum aperture, it performs confidently in low-light situations while delivering smooth background separation.

Featuring a fast and quiet STM stepping motor, this lens provides reliable autofocus performance for both stills and video. An integrated AF/MF switch allows quick transitions to full manual focus control, while the 34mm full-frame equivalent field of view offers a natural wide-angle perspective.

Core Features

• Bright f/1.7 maximum aperture
• STM stepping autofocus motor
• AF/MF focus mode selector switch
• Two low dispersion and two aspherical elements
• Seven-blade diaphragm for smooth bokeh
• 34mm full-frame equivalent angle of view
• Dust- and moisture-resistant lens mount gasket

Optical Design & Performance

The optical construction uses two low dispersion and two aspherical elements to improve sharpness, contrast, and color accuracy while minimizing chromatic aberration and distortion. The seven-blade diaphragm can produce distinctive 14-point starburst effects when shooting bright light sources.

Design & Handling

Compact and lightweight, the lens balances well on Micro Four Thirds camera bodies. Gold-plated electronic contacts support EXIF data transmission, and the included lotus-shaped lens hood helps reduce flare while providing additional front-element protection.