The terrestrial telescope uses three 1.25' interchangeable eyepieces with the latest generation of Kellner eyepiece (K4mm, K10mm, K20mm), which offer sharper and clearer images compared with Huygen's eyepieces. This refractor telescope is can be assembled without tools. Smoothly navigate the sky with a manual alt-azimuth mount and easy-to-use panhandle, which lets you point the telescope up, down, and side to side with precision. 28X-525X. 70mm. 700mm. K4mm, K10mm, K25mm (1.25'). Fully Multi-Coated. Lens Cover, Adjustable High Tripod, Mobile Holder and Photo Shutter. 3X. 90° erect-image prism diagonal. K4mm,K10mm,K25mm Eyepieces. Easy to Assemble& Dismount. Specification:.