- 【Useful Magnification】Come with two replaceable 1.25"" Kellner eyepieces(K6mm/67X, K25/16X) , not instead H Erecting Eyepiece （ low-end, has a small field of view, large chromatic aberration, spherical aberration, field curvature, and small astigmatism). In the case of 400mm focal length & 70mm aperture, 16X-67X enough( no need 3x Barlow lens), because you need trade off of magnification vs brightness.
- 【Excellent Quality Optics】400mm(f/5.7) focal length and 70mm aperture, fully coated optics glass lens create stunning images and protect your eyes. Perfect telescope for astronomers to explore stars and moon. 400x70 refractor scope is a compact and universal telescope with useful magnification power. Suitable for astronomical observations and for terrestrial use
Optical Design: Refractor
Focal Length: 400mm(15.75in)
Resolution: 3 secs
Focal Ratio: F5.7
Zenith Mirrors: 45°Erecting prism Diagonal
Diameter of the Eyepiece: 1.25"
Phone Adapter: for any model