1. F1.4 bright & large aperture: Real bokeh background blur helps to highlight the subject easily. Even in low light environment, you can take photo with low sensitivity and relatively high shutter speed. 2. Electromagnetic aperture: Support M/Av/Tv/P/B shooting modes. 3. 7pcs diaphragm blades: Help to take picture of circular defocused spots or 14-star effect. 4. Live view focusing(LV): When LV is ON, it can focus from special angles, or focus precisely from the broadened view on the display screen. 5. Auto & manual focus: This can meet different shooting needs. And there is built-in focus distance indicator to help you judge the focusing distance in manual focus mode. 6. Glass optical lens, multi-layer coating: Effectively increase light transmittance and control backlight ghost image and glare. 7. Gold-plated contact, high-accuracy chrome-plated metal mount: It's wearable, corrosion-resistant, and highly consistent with the camera. 8. USB firmware upgrade: You can download the latest firmware and upgrade this lens through the USB port to keep the best performance and compatibility of this lens.Specification: General Compatible with Canon: EOS 5D Mark IV, EOS 80D, 1200D, EOS 7D Mark II, EOS 70D, EOS 6D, EOS 650D, EOS 5D Mark III, EOS 600D, EOS 1100D, EOS 60D, EOS 1000D, EOS 500D, EOS 450D, EOS 40D, EOS 30D, EOS 400D, EOS 5D Mark II, EOS 350D, EOS 20D, EOS 300D Model YN50MM F1.4C Material ABS, Metal Lens Structure 7 Groups 9 Elements Aperture Blade 7 pieces Min Aperture f/22 Min Focusing Distance 0.45m Max Magnification 0.15X Filter Diameter 58mm Package Weight One Package Weight 0.72kgs / 1.59lb One Package Size 15cm * 12cm * 12cm / 5.91inch * 4.72inch * 4.72inch Qty per Carton 20 Carton Weight 14.90kgs / 32.85lb Carton Size 56cm * 25cm * 30cm / 22.05inch * 9.84inch * 11.81inch Loading Container 20GP: 634 cartons * 20 pcs = 12680 pcs40HQ: 1473 cartons * 20 pcs = 29460 pcs