The Kowa Spotting Scope line offers Kowa's most advanced optical technology and the best materials known. Kowa's TSN-99 (99mm) and TSN-88 (88mm) scopes feature pure fluorite crystal objective lenses and magnesium alloy bodies, making them among the brightest and lightest. Their TSN-770 (77mm) and more compact TSN-660 (66mm) objective lens versions provide outstanding light gathering power, ensuring a bright field of view. Their sharp views and accurate color reproduction qualify these scopes as the dream instrument of every bird watcher.