Optical design |
Aspherical Cassegrain reflector
|
Primary mirror diameter
|
260 mm
|
Focal length
|
1300 mm
|
Focal ratio
|
f/5
|
Secondary mirror
|
Spherical, 120 mm (minor axis)
|
Corrector rear group
|
Quadruplet air-spaced
|
Image circle
|
80 mm
|
Focuser
|
Rack & pinion, dual speed (10:1) 3.2" diameter
|
Resolving power
|
0.46 arc second
|
Stellar limiting magnitude
|
13.8
|
Focuser
|
Rack & pinion, dual speed (10:1) 3.2" diameter
|
Camera connection
|
M54 x 0.75 male, M48 x 0.75 male
|
Corrector distance
|
75 mm
|
Tube weight
|
15 kg
|
Tube length
|
712 mm
|
Tube diameter
|
280.5 mm
|
Tube material
|
Carbon fiber
|
SKU
|
SS-260CDK
|