Same Magnifications for both TSN-880 and TSN-770 Series feature New mount and Lens design: 5 groups with 7 elements. Extremely comfortable to look through with a 10% wider field of view than the TSN-820M Series and with a 20mm long eye relief, for ease of viewing..

Waterproof and nitrogen purged to prevent the lens from fogging; eyepiece converters allow the use of eyepieces from other spotting scope series.

The eyepieces have a locking system, to prevent loss and a 4 clicks twist-up eyecup.