MARK 4 SPOTTER GR 10-20x40mm Compact – Use it handheld or mount it on a trekking staff or tripod the 10-20x40mm Compact spotting scope gives you the performance of a much larger optic. Carbon fiber construction makes this the ultimate lightweight high-performance optic to pack for hunting or hiking in the most rugged of environments. – Actual Magnification: 10x – 20x – Linear Field of View (ft/1000 yd): 199′ – 136′ – Angular FOV: 3.8 degrees – 2.6 degrees – Twilight Factor: 28.3 – 2 – Exit Pupil: 4 mm – 2 mm – Eye Relief: 18.5 mm – 17.2 mm – Objective Clear Aperture: 40 mm – Length: 7.5 – Weight: 15.8 oz – Close Focus Distance: 5.5′ – Close Focus Distance: 1.7 m