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dof-calculator-pwa

A tiny no-frills depth of field progressive web app for film cameras.

dof-calculator pwa run_(Nexus 5X) __size

Why?

Because this is just one of a series of utility PWA's I've had lying around that I use that might be useful to other folks.

Dev

Hop into the src folder and run the local web server of your choice. No specific tool required.

Build

I didn't really wrap this with build tooling, but I did crunch it down to 1.7K gzip'ed for fun using closure compiler and http-minifier. The rest is just some fancy Linux CLI jumping and sed (and I almost just used a make file instead ;-).

$ yarn install
$ yarn dist

FAQ

  1. How does this calculate depth of field?

This is a pretty basic calc that you can find on the likes of Wikipedia or any of the many DoF calculators out there. This is not a lensmaker calculation (which is more involved).

  1. How does this calculate circle of confusion?

Via: CoC = 1 / (lines/mm * (diagonal^8x10 print / diagonal^filmFormat)), where lines/mm is 5.

  1. Why does this use 5 lines per millimeter as the basis for circle of confusion calculation?

Personal preference.

  1. Why doesn't this include tilt degree?

If I'm using tilt/swing, I've got a loupe on the ground glass. I don't find the calculation for Scheimpflug wedge particularly useful in the field.

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A tiny no-frills progressive web app depth of field calculator for film cameras.

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