Fujinon ZA12x4.5BRD-S10 2/3” Select Series Extreme Wide Zoom Lens ZA12x4.5BERM / BERD 4.5mm super wide angle of HD Zoom Lens Outstanding HD High Optical Performance Equipped New Ergonomic Digital Grip 16bit encoders device for virtual system Model Name ZA12x4.5BERM / BERD Focal length [1x] 4.5-54mm [2x] 9-108mm Zoom ratio 12x Extender 2x Maximum relative aperture (F-no.) 1: 1.8 (4.5-41mm) / 1: 2.4 (54mm) Minimum object distance (M.O.D.) from front lens 0.3m Object dimensions at M.O.D. 16: 9 Aspect ratio [1x] 4.5mm 757 x 425mm 54mm 59 x 33mm [2x] 9mm 373 x 210mm 108mm 31 x 17mm Angular field of view 16: 9 Aspect ratio [1x] 4.5mm 93.6? x 61.8? 54mm 10.1? x 5.7? [2x] 9mm 56.1? x 33.3? 108mm 5.1? x 2.9? Filter thread M127 x 0.75 (Filter attaches to the lens hood.) Approx Size Ï??95 x 237.5mm(Ï?? x Length) Approx Mass 2.0kg (RM) / 2.07kg (RD) (without lens hood)