Telescope Optics & Sky Field-of-View Workbench

Optical Bench Presets

Telescope Optical Specs

Aperture Diameter 203.2 mm (8.0")

Primary Focal Length 2032 mm

Eyepiece & Barlow Setup

Eyepiece Focal Length 25.0 mm

Apparent Field of View (AFOV) 52° (Plössl)

Barlow / Reducer Multiplier 1.00x (None)

Celestial Target

Select Observation Target

Atmospheric Seeing / Turbulence 1.0" (Average Sky)

Schmidt-Cassegrain (SCT 8-inch) with a 25mm 52° Plössl eyepiece delivering 81.3x magnification and 38.4 arcmin true field of view.

Magnification 81.3x f/10.0

True Field of View 0.64° 38.4 arcmin

Exit Pupil 2.50 mm Optimum Range

Dawes Limit 0.57" Rayleigh: 0.68"

Light Gathering 843x vs 7mm human eye

Optical Assessment: Balanced optical configuration. Exit pupil of 2.50 mm is in the crisp sweet-spot for deep-sky and planetary viewing.