Synergy
TPF Noob!
As technically orientated as I am, I’ve often wondered how auto focus on a camera actually works. Three theories are that
1. a beam, like radar, is bounced off the subject with the return time depicting the distance and therefore focus position.
2. a rather small computer of sorts looks at the image and says “hmm not in focus, let me twiddle this knob and see…”
3. An invisible measuring stick is protruded out of your camera by leprechauns (small ones) who then twiddle the knobs.
Please help me…
1. a beam, like radar, is bounced off the subject with the return time depicting the distance and therefore focus position.
2. a rather small computer of sorts looks at the image and says “hmm not in focus, let me twiddle this knob and see…”
3. An invisible measuring stick is protruded out of your camera by leprechauns (small ones) who then twiddle the knobs.
Please help me…