BAADER BESSEL V PHOTOMETRIC FILTER Computerized The ASI664MC has a HCG

The ASI664MC has a HCG mode which effectively reduces readout noise at high gain settings while preserving the same wide dynamic range that you would get at low gain

This expedient allows to balance the exposure of each channel with the ratio of 1:1:1

35 mm (105 mm with optional reducer) Mount attachment CGE dovetail plate Threads 2"-24 UNC Tube length 432 mm Tube weight 6

Connection side A Sky-Watcher finderscopes Connection side B 1

BAADER BESSEL V PHOTOMETRIC FILTER Computerized The ASI664MC has a HCGThe Baader Bessel V filter is a precision grade photometric bandpass filter with a central wavelength window between 500 700nm. The UBVRI system was developed in the 1950s for the 0. 9m McDonald Observatory telescope and initially consisted of a Johnson UBV filter set, later extended by Cousins to include the R and I filters for the red region of the spectrum. The filters of the extended UBVRI system according to Johnson and Cousins include: U