Product Description Product name LAOWA 8-15mm F2.8 FF Zoom Fisheye Format Compatibility FF Focal Length 8-15mm Aperture F2.8-22 Angle of view 175°-180° Lens Structure 13 elements in 9 groups Aperture Blades 9 Focus Throw 70° Zoom Throw 75° Aperture Throw 42° Focus Scale Dual Scale Min. Focusing Distance 16cm Max. Magnification 0.23x Focus mode Manual Focus Dimensions RF: 94.5mm*Ø76.4mm GFX: 101.2mm*Ø76.4mmXCD: 96.36mm*Ø76.4mm  Weight ~650g（not including the front and rear cap） Mounts E , Z , L , RF