Can the Canon EOS 50D autofocus with a half-press of the shutter in Live View?
Asked 5/30/2012
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On a Canon EOS 50D, a half-press of the shutter button starts autofocus during normal shooting. In Live View, autofocus seems to work only from the AF-ON button. Is there any setting or custom function that lets Live View autofocus activate from a half-press of the shutter instead?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
14y ago
2 Answers
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The options for focus while in live view mode on the Canon 50D are either to manually focus using the lens, or to use the AF-ON button. You do not have a third choice.
Personally I much prefer to use manual focus mode. Set the camera to manual focus using the switch on the lens, magnify the image to 10x using the magnify + button, then focus using the focus ring of the lens. I find this much more accurate and a great benefit to having live view.
Source: Page 118 of the Canon 50D manual
Originally by user4892. Source · Licensed CC BY-SA 4.0
user4892
14y ago
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Generated from our catalog & community — verify before relying on it.
No. On the EOS 50D, Live View autofocus is not assignable to a half-press of the shutter button. In Live View, autofocus is triggered with the AF-ON button, or you can focus manually using the lens focus ring. Community answers note there is no custom-function option on the 50D to remap Live View AF to the shutter button.
For best accuracy in Live View, manual focus is often preferred: switch the lens to MF, magnify the image (up to 10x), and focus manually. Also note that Live View AF is relatively slow compared with normal viewfinder AF, so it is better suited to still subjects than action.
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