The Chinese company Shenzhen Yongnuo Electric has introduced an upgraded YN 50mm F1.8 DA DSM II lens for Sony APS-C cameras with improved autofocus compared to the previous version. It is already available for purchase on the manufacturer’s website .
Technical features:
- The optical design consists of 8 elements in 7 groups, including one low dispersion to reduce distortion. Oil-, moisture-, dirt-repellent fluorine coating of the front lens. Diaphragm 7 blades, round.
- With enough light, the lens produces a soft blur effect. You can adapt to low light conditions and shoot normally with low sensitivity and high shutter speed.
- Small size, light weight (134g), digitally controlled stepping motor (DSM) and advanced focusing algorithm. The lens has a dust- and moisture-resistant design, a high-precision metal bayonet mount and a gold-plated contact. There is a USB Type-C interface for firmware updates.
MTF Charts
Optical design
Specifications YN 50mm F1.8 DA DSM II
- Sensor Format: APS-C
- Focal Length: 50mm (75mm in 35mm equiv.)
- Viewing Angle: 30.4°
- Aperture Range: F1.8-F16
- Aperture: 7-blade
- Optical design: 8 elements in 7 groups
- Minimum focusing distance: 0.45m
- Maximum magnification: 0.14x
- Filter Thread Diameter: 49mm
- Lens dimensions: Ø64 x 58 mm
- Weight: 134g
What about the prices?
The new YN 50mm f/1.8 DA DSM II is already available for purchase on the manufacturer’s website at a price of 799 yuan (~$119), the previous version is sold a little cheaper – for 699 yuan (~$97).
