Photographer’s toolkit

Little astro helpers that run in the browser. There’s a 500 rule calculator for star trails, plus moon phase, golden or blue hour timing, print size or DPI math, exposure equivalence, and more stuff over time. Dark UI, fine on a phone next to the tripod.

• 500 rule max shutter before trails, by crop and focal length
• Moon phase rough sky brightness vibes for planning nights out
• Sun hours blue and golden windows from lat long
• Print size megapixels vs inches and DPI
• Exposure equivalence swap ISO, aperture, shutter while staying close on brightness

Built with Next.js, MUI, Framer Motion. Static export friendly if you want to host it anywhere boring.

There’s a demo on Amplify if you want to poke around without cloning.

npm install
npm run dev

Production build (also writes static files under out/ when output: export is set):

npm run build

GitHub Pages style deploy:

npm run deploy

Pick sensor crop and focal length, get a ballpark max shutter before stars smear: 500 ÷ (focal length × crop factor). Earth spins, your tripod doesn’t, so this is a rule of thumb not a law of physics.

Full frame (1×), Canon APS C (1.6×), Nikon or Sony APS C (1.5×), Micro Four Thirds (2×).