BAADER BESSEL B PHOTOMETRIC FILTER Size:36mm 8kg fully assembled

8kg fully assembled

you can power and control the focus motor through the mount using the supplied AUX cable

This M68 Male to 2" SC Female adapter has male M68 x 1 threads on one side and female 2" Schmidt-Cassegrain threads on the other

You can even use UV-filters (such as the Baader U-Venus-filter) or IR-pass-filters and achieve surprisingly good contrast

30B303A: for small flat fields with a diameter of 165mm

BAADER BESSEL B PHOTOMETRIC FILTER Size:36mm 8kg fully assembledThe Baader Bessel B filter is a precision grade photometric bandpass filter with a central wavelength window between 400 500nm. 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