This Kowa scope is small in size but has enormous capability. The TS-500 series has a 50mm objective lens and is available with 2 different built in eyepieces, 20X or 20-40X zoom. There are 2 body design configurations, offset 45 degree and straight. In all there is a line up of 5 different scopes to choose from. The TS-500 series is the ideal go anywhere scope with unlimited applications, including use for observation and sporting events.