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Canon T4i with Restricted Auto Focus and the Zoom H4n

706 views · Published 25 February 2013 · 2:23 · Indexed 18 October 2026

Channel: Ask Joe - Joe Crescenzi - @AskJoe - AskJoe (.TV) · 2013 · Science & Technology

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This is my second test using the Canon T4i (650D) autofocus.  This time, instead of letting the camera follow my face, I restricted the focus area to a specific spot, around my eyes.  In this test, I am using the new 40mm f/2.8 lens, set at f/2.8 with 1/60th second shutter, and an ISO of 800.

Also, to eliminate the sound heard from the auto-focus, I am using a Zoom H4n, with a Shure wired lavalier microphone.

In my opinion, the auto-focus is still not quite right, mainly because it tends to re-focus too often.  Since I was seated in the same place, there was no reason for the camera to re-focus, except when I moved.  On the plus side, it did re-focus when I moved, which is the reason I bought this camera, but I would love to have some kind of feature to lock it and tell it to refocus whenever I make a drastic move, or when I hit a button.  I especially need auto-focus when I film myself, because nobody can do it for me, but once I'm on my mark, it would be great to trigger a button to stop it from re-trying.

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