from the workbench
Build it. Run it. Look up.
A build log of hands-on astronomy: upgrading telescopes and mounts, writing the code that drives them, and working with the data they collect. Real parts lists, real costs, and what went wrong.
Open the logbook ↓ToolsField of view of my camera?tan(θ/2) = d / 2fθ = 2·arctan(d / 2f) ≈ 57.3° × d / fAPS-C: d = 23.5 mm, f = 1000 mmθ ≈ 57.3 × 23.5 / 1000 ≈ 1.35°≈ 2.6 full Moons across! try the calculator →
Logbook
No. 1 is on the bench. Coming soon.