16
Manual: Baader Planetarium TriBand-SCT
Technical Data
TriBand 8"
TriBand 9¼"
TriBand 11"
SKU
# 2301002
# 2301003
# 2301004
Aperture
203 mm (8")
235 mm (9¼")
279 mm (11")
Focal Length
2032 mm
2350 mm
2800 mm
f/ratio
f/10
f/10
f/10
Optical Design
Schmidt-Cassegrain
Schmidt-Cassegrain
Schmidt-Cassegrain
Transmission Range
380 to 400 nm, 480 to 515 nm, 630 to 680 nm
Accessory Adaptation
2" SC-thread,
1¼" Visual Back
2" SC-thread,
1¼" Visual Back
3,3" + 2" SC-thread,
1¼" Visual Back
Ideal Back Focus
127 mm primary mirror
baffle tube lock ring
139 mm from primary
mirror baffle tube lock ring
139 mm from 3 in-2 in
Reducer Plate / 152 mm
from 3 in Primary Mirror
Baffle Tube Lock Ring
Secondary Mirror
Obstruction
6,9 cm
8,5 cm
9,5 cm
Secondary Mirror Ob-
struction by Diameter
33,8 %
36,2 %
34 %
Secondary Mirror
Obstruction by Area
11,4 %
13,0 %
11,6 %
Resolution (Rayleigh)
0,69"
0,59"
0,5"
Resolution (Dawes):
0,57"
0,49"
0,42"
Optical Tube Material
Aluminium
Aluminium
Aluminium
Optical Tube Length
43 cm
56 cm
61 cm
Dovetail Bar
3" CGE
3" CGE
3" CGE
Weight
6,25 kg
10 kg
13,1 kg
Transmission of the Schmidt Corrector Plate
The transmission of the TriBand coating and the position of important emission lines
The corrector is blocked in the IR up to 1400 nm to prevent the tube from heating up.
