YN50mm F1.8S DA DSM is an automatic focus lens designed for the E mount APS-C frame digital camera of S, which has excellent performance in blurs background to highlight the main body, imaging sharpness, volume and weight.

Functions:

1.Carry the digital stepping motor, Compared with the traditional DC motor, digital stepping motor (DSM) has fast start and stop response, high focusing accuracy and quieter focusing action, which is suitable for photo shooting and short film recording.

2.Electronic focus rings, Adopts electronic focus rings, supplemented by appropriate damping, which can provide  smooth manual focus experience of high precision.

3.USB Firmware Upgrade, Equipped with USB interface, you can download the latest firmware from Yongnuo official website to upgrade the lens.

4.F1.8 Bright and large Aperture, Flexible use of F1.8 large aperture, easy to obtain a soft and beautiful blur effect. In low light environment you can also use a low sensitivity and high shutter for shooting.

5.Low dispersion glass lens, Adopts one low dispersion glass lens,which not only better suppress the dispersion problem, but also further improve the secondary spectrum.

6.Internal focus design, small and lightweight, Focusing lens set adopts internal focusing design,the weight is only about 146 grams, small and light, easy to carry.

7.7 groups of 8 pieces of optical structure design, nanometer multi-layer coating, Adopts 7 groups of 8 pieces of optical structure design, nanometer multi-layer coating process of lens can effectively improve the light transmittance and inhibit the ghost image and glare of backlight.

8.Gold-plated contact, metal bayonet, Adopts gold-plated contact and high-precision metal bayonet, it can effectively improve the signal conductivity and corrosion resistance.

9.Fast autofocus (AF) and manual focus (MF) are supported, Auto focus and manual focus are supported,you can choose the focus mode according to your shooting requirements.

10.Seven circular aperture blades, With 7 circular aperture blades, circular dispersion spots can be shot, and 14 star awn effects can be achieved by properly reducing the aperture.

Specifications:

• Equivalent to 35mm focal section:about 75mm
• Bayonet: E mount
• Frame: APS-C
• Angle of View: about 30.4 degree
• Lens Construction: 7 groups 8 blades
• Aperture Blades: 7 blades
• Minimum Aperture: F/16
• Closest focus distance: about 0.45 meters
• Maximum Magnification: about 0.14×
• Filter diameter/available number: 49mm/1
• Maximum diameter and length: about Φ64×58mm
• Weight: about146g