Pixel Scale & Sampling
Calculate angular pixel scale and compare it with seeing-limited Nyquist sampling for astronomy and long-lens imaging setups.
Pixel scale
1.238
arcsec/pixel
Sampling
2.02 px
near nyquist
Nyquist focal length
792 mm
1.25 arcsec/px target
Pixel scale converts detector pitch into angular sky width. The seeing disk should usually cover about 2-3 pixels for balanced sampling.
Detector sampling geometry
The blur footprint is drawn over the pixel grid at the current pixels-per-FWHM value.
Pixel scale
1.238 arcsec/px
Seeing disk
2.02 px/FWHM
Sampling class
near nyquist
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.