L-R-G-B-Ha 68mm filterset Deepsky/ SBIG STX and Keller-ASA-Cassegrain

For the color imaging of deepsky objects a larger diameter L-R-G-B-Ha of 68mm is required in order to prevent the vignetting during autoguiding with the internal guider chip. A frameless filterset 
from Baader-Planetarium Germany is used in combination with the STX-16803 SBIG CCD camera. The filterplates are placed in the slots of the STX filterwheel.

Pos 1 • L= light filter (UV/IR cut)
Pos 2 • R= red filter or  SII=sulfur/'red' filter ... Hubbel Palette
Pos 3 • G= green filter 
Pos 4 • B= blue filter or  OIII=oxigen/'blue' filter ... Hubbel Palette
Pos 5 • Ha=H-alpha filter Ha=hydrogen/'green' filter ... Hubbel Palette

The three narrow band filters SII/Ha/OIII can be assorted to the R/G/B channels in the imageprocessing program as required.

For the imaging of Planets/Moon/Sun various filters (1,25) are combined in one filterwheel (9er set)

For the Sun the bright light is in adddition blocked by a special blocking filter foil -Baader AstroSolar® Safety Film OD 5.0-  in front of the telescope.