About Astrofoc.us

Hello and welcome! 🥷

Back focus is essential in astrophotography. But let's face it — it's also a challenge! Too little or too much back focus, and the precious photons you've been collecting for hours create egg-shaped stars.

Don't panic! Astrofoc.us is here to help.

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Disclaimer

• Astrofoc.us is a private, non-profit website and has no affiliation with any vendor
• Signing up and using this website is completely free
• Your e-mail address is only used to contact you (if you activate this option) and allows you to reset your password
• The data you provide is yours and will always be! It will never be sold nor shared with anyone
• You have the right to permanently delete any information you have provided
• This website is hosted in France by Monarobase