Voigtlander'sSE series for E mount are smaller and lighter than Voigtlander FE lenses with same optics by eliminating the clickless selective aperture option for video. Of course SE lenses can still shoot video, with click stops. Two Aspherical Elements, 4 Aspherical Surfaces. 7 elements, 9 groups. F/1.2 to F/22 in 1/3 click stops 12 aperture blades for smooth bokeh. Same optics as the M 35mm f/1.2 Nokton VIII with optics optimized for the E Sensor. IQ similar to the other Voigtlander f/1.2 family members, 40mm & 50mm. 58mm filter size. Close focus 11.8 inches or .3 meters. Weight 13.65 ounces or 387 grams. Diameter x Length Φ66.5mm x 59.9mm. Chipped for communication with E body, Manual Focus Assist, EXIF Data, Auto Lens Correction. 5-Axis Image Stabilization Providing Camera is Capable, Lens hood and Lens caps included.