***** **********Best Quality Guranteed. *****BSI CMOS Sensor; This telescope camera uses an extremely sensitive back-illuminated CMOS sensor; IMX290 sensor has very high QE and very low ( 0.7 e-) read noise; which improved sensitivity in the visible-light and near infrared light regions for industrial applications*****128MB DDR Buffer; The benefit of the image buffer is that the memory will cache the image and transfer it to the computer when the USB interface is not busy or being interrupted; and the frame will not be lost or corrupted*****Any Area ROI Support; The SV305 astronomy camera has ROI function; A smaller region of interest (ROI) is read out from the sensor; leaving the image scale of the object being imaged unchanged; Allow arbitrary resolutions to be set*****SV305 could work with C-lens; As people need use the camera with a c-lens; we design the SV305 with the c-lens adapter*****Long exposure can reach 30 minutes; high-speed; medium-speed; low-speed three output frame speeds are o