Professional optics lensThe 45-degree diagonal mirror can always achieve a positive image;6mm and 25mm eyepieces provide different levels of magnification; 4 color moon filter can filter out a lot of reflected light.3 professional optical lenses give you clearer, more realistic images Please choose a moon filter to install between the diagonal mirror and the eyepiece. | Multi-Coated Lenses and 70mm Large ApertureFully coated optics glass lens with high transmission coatings creates provides clean, crisp views, delivering 99% total light transmission, and protect your eyes.;The large 70mm aperture collects light better than the 50mm aperture, and the picture resolution is higher, the image is clearer, and the color reproduction is higher. | FinderscopeYou can use the finderscope to locate the planet you want to observe, and then guide the planet to be observed to the center of the main telescope's field of view. |