These Sunagor Mega Zoom 20-100 x 50 mm Binoculars offer phenomenal power with a zoom range starting at 20x going up to 100x magnification. Front objective lens size is 50mm. These binoculars are aimed at the user who has a need for very high magnification, together with full objective lenses, whilst retaining a reasonable overall size and weight. This desirable combination of features and specifications make this model very popular with aircraft spotters. The Mega Zoom binoculars are rubber-armoured and come complete with a tripod adapter.