BAADER BESSEL V PHOTOMETRIC FILTER Computerized included the dual plates Lodual

included the dual plates Lodual and Maxidual

Baader Hyperion 17mm eyepiece

On the telescope side you can find an M48 female thread while on the camera side an M42 male thread

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

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

BAADER BESSEL V PHOTOMETRIC FILTER Computerized included the dual plates LodualThe 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