SVBONY SV260 multi-bandpass filter is a 5-bandpass broadband pass light pollution filter; equipped with OD4 cut-off depth and over 90% peak transmittance; the filter is designed to isolate 6-level light pollution and make light wave transmission maximum; SV260 filter effectively brings you a better shooting experience when starfield shooting and deep-sky photography. he SV550 APO Triplet refractor with 80mm aperture and fast f/6 focal ratio, a great travel telescope for observation and astrophotography. 4 extinction bars are designed to meet your ultimate pursuit of extinction. The 2.5-inch focusing base can effectively reduce the vignetting problem when connecting to a full-frame camera, and the FPL51 APO can improve the quality of the captured images. SV405CC cooled color astronomy camera is designed with imx294 color cmos sensor; the imx294 sensor adopts the 4/3 format and provides the necessary number of pixels for true 4k output at 120 frames per second. SV226 filter drawer adopts integrated CNC molding and anti-light leaking design. It can compatible with 1.25" & 2" specifications filters on the market. Strong magnetic attraction, prevent the filter from falling off. SV209 is a special field flattener for SV550 80F6 OTA; which can effectively improve the image quality problem of SV550 OTA fringe field curvature; keeps the focal length and focal plane position of the primary mirror unchanged while improving the field curvature problem.