SV503 70mm telescope is ideal for observing galaxies, nebulae and star clusters, delivering crisp and bright images. It with built-in field flattener and Extra-Low Dispersion Glass, which can virtually eliminate the field curvature and chromatic aberration,providing true colors.SV135 fully multi-coated zoom plossl eyepiece zooms to any focal length between 7 mm and 21 mm - pick the better magnification for your subject. As a beginner; SV135 zoom eyepiece is good for starter astronomer!Explore the stars with the SVBONY SV182 6×30 Finderscope. Wide 30mm aperture, fully multi-coated optics, and a 90° correct-image design bring comfort, clarity, and precision to every stargazing night.