Meike 50mm f/2.0 Large Aperture Manual Focus MFT M4/3 Lens APS-C for Micro 4/3 System Olympus Panasonic Lumix Mirrorless Cameras Lens structure:5 groups 6 slices Minimum aperture: f/22 Filter diameter:49mm super multi-coated/Angle: Diagonal 59 degree Horizontal 50 degree Vertical 33 degree 50 Maximum magnification: 0.08x