Aperture Focal length F-ratio Barlow or reducer Model

Number of pixels Pixel size Model

Sensor size Image scale Resolution

Wavelength
Dawes' limit
Rayleigh criterion
Airy disk

Reference
F-ratio
Exposure time

The CCD Calculator simulates the field of view of a given telescope and CCD camera.

Note that the simulated view is only a rough approximation. If you want to use this tool to estimate whether a certain object will fit on the imaging sensor your camera a margin of error of several pixels should be taken into consideration.

The calculated values are of course correct since they are based on actual formulas.

Usage
Hover the mouse pointer over the label of each field to reveal additional information and to show the used formulas for a given calculation.