Scope Calculator

Parameters

Aperture [mm]

Focal Length [mm]

Eyepiece FL [mm]

Apparent AFOV [°]


 

Database



 

Eyepiece-dependent

• Power (magnification): 89x
• True FOV: 0.73° (43.7')
• Exit pupil: 1.4mm ø
• Field stop: 15.9mm ø
• Star transit time: 175 sec

Aperture-dependent

• Focal ratio: 1/10.0
• Max magnification: 200x
• Min magnification: 25x
• Prime focus magnification: 29x
• Light area: 122.7 cm²
• Light gathering power: 319x
• Angular resolution: 0.9"
• Limiting magnitude: 13.0
• Moon features: >5.4km

All values are approximate and purely theoretical under ideal observation conditions.