The A70Lf is an Achromatic Refractor with 70mm (2.8”) of aperture. Its focal length is 900mm (3 ft.) with an f ratio of 12.9. This lightweight telescope has a maximum magnifying power of 143x and reaches a limiting visual magnitude of 11. Its light gathering is 100 times better than the human eye and has a maximum (realistic) power of 143X. The A70Lf Refractor weighs about 4 lbs and is covered by Vixen's 5 Year Warranty.