CCD Pixel Scale Calculator
Pixel scale tells you how much sky each pixel of your astronomy camera covers, measured in arcseconds per pixel, and it decides whether your setup is under sampled, well matched or over sampled for the night sky. It is the pixel size in microns divided by the focal length in millimeters, multiplied by two hundred six point three. For deep sky imaging most people aim for one to two arcseconds per pixel to match typical atmospheric seeing. This calculator computes the scale from your pixel size and focal length, then flags the sampling regime so you can decide whether to add a Barlow, a reducer or binning. It runs entirely in your browser.
How to use CCD Pixel Scale Calculator
- Enter your camera pixel size in microns.
- Enter your telescope focal length in millimeters.
- Read the arcseconds per pixel and compare it to your usual seeing.
Frequently asked questions
What does arcseconds per pixel tell me?
It is how much sky each camera pixel covers, which sets how finely your image samples detail; the value comes from pixel size divided by focal length times a fixed constant.
What pixel scale is matched to typical seeing?
Sampling near 1 to 2 arcseconds per pixel usually matches average seeing; much finer wastes signal on blur while much coarser throws away resolution.
How do pixel size and focal length change the scale?
Larger pixels or shorter focal length raise the arcseconds per pixel, giving a wider but coarser field, while long focal length with small pixels samples finer.
What is CCD Pixel Scale Calculator?
Pixel scale tells you how much sky each pixel of your astronomy camera covers, measured in arcseconds per pixel, and it decides whether your setup is under sampled, well matched or over sampled for the night sky. It is the pixel size in microns divided by the focal length in millimeters, multiplied by two hundred six point three.
Is CCD Pixel Scale Calculator free to use?
Yes. CCD Pixel Scale Calculator is completely free, with no sign-up and no usage limits.
Does CCD Pixel Scale Calculator work in a web browser?
Yes. CCD Pixel Scale Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with CCD Pixel Scale Calculator?
Yes. CCD Pixel Scale Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
Badge
Link this tool from a README, doc or site. The badge links back to this page.
[](https://yourhack.ai/ccd-pixel-scale-calculator)