The opticron explorer 10x21 is the perfect companion for explorers of all ages compact enough to be carried easily in the palm of your hand or hanging securely from its wrist strap the model delivers clean crisp images with good levels of brightness and comfort the roof prism body is fully armoured for extra comfort and grip and folds up to 92x65mm for easy transport and storage the ribbed focus wheel makes for easy focusing infinity to under 2m and the models are designed to give a good