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Canon Minimum Focus Distance Switch
I was wondering what the minimum focus distance switch does. Here's what it looks like:
MFD Switch
MFD Switch
I thought it was a mechanical lock to prevent you from focusing closer, but had no idea why. When I got to play with a lens that had this switch, I could still focus to minimum distance manually! Then I tried using AF and figured out what it's for:
The switch tells the camera auto-focus not to focus closer than what is selected. Helps the focusing algorithm work faster by eliminating some guesswork. That's it!
Ches Koblents
October 10, 2013
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