18" Newton

Iiro's DeepSky Sketches

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Primary mirror 457 mm
Focal length 2280 mm
Focal ratio F5
Secondary mirror 117 x 83 mm
Focuser diameter 2" / 1.25"
Resolution 0.3"
Limiting magnitude ~17 mag
Length 2400 mm
Widht 650 mm
Mass Heavy
Finderscope 8 x 50 mm + Telrad