SV193 2" 0.8x focal reducer and field flattener for refractor telescopes, which can meet the illumination needs of full-frame shooting. With SV503 80ED refractor telescope, it can take dazzling celestial photos without worrying about the distortion of the star points on the edge of the photo. SV305C telescope camera adopts the latest IMX662 1/2.8” back-illuminated sensor. The camera has ultra-high sensitivity and ultra-low readout noise. It has better performance in planetary photography and lunar surface photography, and is very suitable for EAA. 6x Magnification With 6x magnification, the SV182 finderscope helps you to locate and track the celestial targets quickly. Whether you are an amateur or professional astronomer, the scope will be the better choice to observe.SVBONY Universal Dovetail Base is compatible with finder scope; can be installed on telescope; Compatible for Clestron Orion Sky-watcher Vixen and so on. SV503 80ED telescope's objective lens features an S FPL-51 extra-low dispersion glass ED element, which virtually eliminates chromatic aberration. This results in the good color correction for an ED doublet lens.