Introducing the SLR MAGIC Bundle kit.Model: SLR1021MFT77VNDLThis bundle consists of the HyperPrime 10mm T2.1 MFT lens and the 77mm variable Neutral Density Filter, which allows photographers to have a greater exposure control when shooting. The lens itself is designed to be used with an MFT-mount camera with Four Thirds sized sensor, that is well balanced between the size, form and function.- Geared Focus and Aperture Rings- Clickless Aperture Ring- Lens Front Doesn't Rotate During Focus- Includes Variable ND from 2.3 to 6 StopsSpecifications:- Focus Type: Manual- Focal Length: 10mm (20mm MFT)- Maximum Aperture: T2.1- Minimum Aperture: T16- Number of Diaphragm Blades: 12- Lens Construction: 13 Elements in 12 Groups- Filter Socket Size: 77mm- Filter Thread Diameter: 77mm (rear), 86mm (front)- Dimensions Length: 79mm- Weight: 420g