BAADER BESSEL I PHOTOMETRIC FILTER GEOPTIK15 Prima Luce Lab ESATTO 3"

Prima Luce Lab ESATTO 3" 65mm extension tube installed on Skywatcher Esprit 100ED

12 mm free aperture

Length: 400 mm

The Geoptik Nadirus 16" kit is a high quality Italian-designed and manufactured Dobsonian telescope made from lamellar beech and birch

5e- at lowest gain (5

BAADER BESSEL I PHOTOMETRIC FILTER GEOPTIK15 Prima Luce Lab ESATTO 3"The Baader Bessel I filter is a precision grade photometric bandpass filter with a central wavelength window between 700 900nm. 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