MEKE Meike MK 28mm f/2.8 Fixed Manual Focus Lens for Mirrorless Camera Panasonic Lumix Olympus E-M1 E-PL GH4 GH8 GX8 GF3 GF2 GF1 GX1X GM1 G6 GX7 GM5 with Voking Lens Cleaning Cloth Lens structure:5 groups 6 slices Minimum aperture: f/22 Filter diameter:49mm super multi-coated / Angle: Diagonal 55 degree 30' Horizontal 46 degree 30' Vertical 30 degree 25' Maximum magnification: 0.11x