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Takahashi FSQ-85ED Specifications

Optical specifications

Spec. FSQ-85ED
Optical design Modified Petzval quadruplet apochromat
Aperture 85mm
Standard
Focal length 450mm
Focal ratio F/D 5,3
Resolution 1,5"
Limiting magnitude 11,6
Light grasp 178x
Image circle 44mm
Photo field 5,6°
Back focus 197,5mm
With Reducer-QE 0.73x
Focal length 328mm
Focal ratio F/D 3,86
Image circle 40mm
Photo field
Metal back 72,2mm

Mecanical specifications

FSQ-85ED - Longitudinal views

Takahashi FSQ-85ED longitudinal views

Specifications

Spec. FSQ-85ED
Tube length (min/max) w/ standard accessories 553mm-645mm (retracted dew shield/extended dew shield)
Tube diameter 95mm
Rack-and-pinion tube diameter 80mm
Tube weigth 4 kg