Exact geometry
Your equipment workspace
One setup. Complete equipment context.
Configure your imaging train once. This equipment-only page keeps the setup in its URL; the separate calculations sheet consumes the same train without an account.
Your imaging train
Configure the optical path
Start from verified presets or enter every value manually. Focal length remains the primary field-of-view input.
01
Telescope
Choose a sourced model or keep the current values as manual.
Search by manufacturer or model; choosing a result populates every known telescope value.
Catalogue preset · Sky-Watcher Evostar 80EDX APO Refractor
ED doublet apochromatic refractor. Verified . Source specification.
Unit: millimetres
The principal input controlling field of view.
Unit: millimetres
Used to calculate focal ratio; changing aperture alone does not alter field of view.
Calculated as N in f/N from native focal length ÷ aperture.
02
Optical modifiers
Build the ordered reducer, flattener, or Barlow chain.
Search verified modifiers. A used preset is disabled to prevent accidental duplicates.
No optical modifiers applied.
03
Camera
Use physical sensor dimensions or derive them from pixels.
Search by manufacturer or model; choosing a result populates all known sensor values.
Catalogue preset · ZWO ASI2600MC Pro
Sony IMX571 · 6248 × 4176 px · CMOS colour
Verified . Source specification.
Unit: millimetres
Unit: millimetres
Unit: micrometres
Native pixel pitch before any binning or resampling.
04
Capture conditions
Describe effective pixels and the seeing at your site.
Calculated overview
What this setup tells you
Open any card for its full controls, equations, and interpretation.
Equipment-derived
Resolution & Sampling
1.293″ / pxWavelength and seeing are chosen in the detail calculator.Open resolution details →Full train ready
Drift & Polar Alignment
1.293″ / pxAdd a measured signed drift, duration and pointing geometry.Diagnose measured drift →Exact field ready
Mosaic Planning
2.24° × 1.50°Add target extent, overlap and time per panel.Build a panel grid →Optical train
Reducer & Barlow
600 mmEffective f/7.5 from no modifiers.Open modifier details →Needs measurement
Sensor Tilt
Enter focus differences across the sensor in the detail calculator.
Measure sensor tilt →Needs dimensions
Back-focus Spacing
Enter component depths and the manufacturer’s nominal back focus.
Build the spacing stack →Main train ready
Guiding Ratio
1.293″ / pxAdd the guide scope and camera in the detail calculator.Compare guiding scales →Full train ready
Exposure & Signal-to-Noise
1.293″ / pxAdd measured source, sky and camera-noise rates.Estimate the exposure stack →Needs weather
Dew Point & Heater Power
80 mm opticAdd temperature, humidity and heater geometry.Plan dew control →Camera-derived