BAADER BESSEL R PHOTOMETRIC FILTER Size:65x65mm The William Optics Dr Flat

The William Optics Dr Flat Master is an apochromatic triplet 0

Another significant advantage of very low friction is that the risks of motor slipping during GOTO operation is virtually nil

The external layer is highly reflective (it is similar to Mylar) and blocks 99% of the sun's heat keeping your telescope cool

Pleiades 111 WIFD OTA

The HPS mounts can do the same

BAADER BESSEL R PHOTOMETRIC FILTER Size:65x65mm The William Optics Dr FlatThe Baader Bessel R filter is a precision grade photometric bandpass filter with a central wavelength window between 550 800nm. 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