FSQ-85ED
Bonus
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 | 7° |
| Metal back | 72,2mm |
Mecanical specifications
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 |