A focus test using the Canon T4i with the 40mm f/2.8 STM lens and the 50 f/1.4 Non-STM lens – Test here is to see the difference, if any, in the speed of focus and to listen for the differences in what the on-board stereo mic picks up when the two lenses are focusing.

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UPDATE – I am giving away a Canon 40mm EF f/2.8 STM Lens

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2 COMMENTS

  1. Thanks for an interesting video, I have had my 650d with 18-135 STM for 2 weeks and shot about 3 hrs of video. There are 4 settings for continuous AF, FlexiZone multi, Flexizone Single, face tracking and ‘quick mode’. Do you know what mode it was in for this video?

    My camera came default with face tracking selected (it fails over to Flex-multi if no face found), and when i switched it to ‘quick mode’ the AF seems to work better, its the only mode that uses the dedicated sensor. Interestingly-The flexizone multi has up to 31 AF points.

    • Daytona, I left it in default, face + tracking mode, for all my tests – as you stated, it should switch to Flex-multi if no face is found. I touched the screen to grab initial focus of my subject. Yes, Quick mode works MUCH better because it uses the bigger brains of the camera and is a great way to get initial focus but cannot be used for continuous focus and is not available while you are shooting video.

      the 31 AF points is very interesting – I think what they are calling points and what the rest of the world calls points is not quite the same here.

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