Bahtinov goes digital

The Bahtinov focussing spikes are detected automatically, allowing for a quantification of focus quality (movie):

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You can also point your webcam with its original lens to an image of Bahtinov spikes to test:


or test it on a set of three dark artificial lines, by checking the “dark lines ona lighter background” checkbox:


Or even point it at a movie in your browser (from YouTube for example) to see it track focus live:


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