Telescope Optics & FOV Simulator

Optics v2.4
Target: Jupiter & Moons | TFOV: 0.64° (38.39')
Outer circle represents the eyepiece field stop. Drag scene to adjust framing.
Magnification 81.3×
True FOV (TFOV) 0.64°
Exit Pupil 2.50mm
Focal Ratio f/10.0
Dawes' Resolution 0.57
Light Gathering 842.6× eye
✓ Ideal Exit Pupil (2.5mm): Optimal balance between sharpness and image brightness.

1. Celestial Target

2. Telescope Presets

3. Optical Param Tuning

Aperture (D) 203.2 mm
Focal Length (F) 2032 mm
Eyepiece Focal Length 25.0 mm
Eyepiece AFOV 52.0°
Barlow / Focal Reducer 1.0× (None)

Optical Specifications

True FOV (Arcminutes)38.39'
Limiting Visual Magnitude14.20
Effective Focal Length2032 mm
Field Stop Scale Factor1.00×
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