topic Re: Autofocus not holding in EOS DSLR & Mirrorless Cameras

EOS 300D Autofocus not holding

mforster86 — Sat, 05 Jul 2025 18:42:35 GMT

Hi,

I have a Canon Rebel, I've had no problems with the lens that comes with it (18-55mm) but whenever I use the 50mm f/1.8 II lens it will autofocus when holding the shutter button partially but then when compressing fully to take the photo there is always a slight auto adjustment on the lens knocking it slightly off focus. The only way I've been able to get around this is to autofocus then turn to manual focus on the lens before taking the photo.. which isn't ideal.

Any suggestions?

Re: Autofocus not holding

Waddizzle — Mon, 18 Sep 2017 01:24:24 GMT

Try setting the focus mode to One Shot. The "AI" modes try to continuously update the focus until you press the shutter.

Re: Autofocus not holding

mforster86 — Mon, 18 Sep 2017 22:03:45 GMT

I'm not sure I entirely understand, do you mean changing it from multi shot to single shot? I can't see any settings for focus just white balance. The camera is a eos 300d

Re: Autofocus not holding

kvbarkley — Mon, 18 Sep 2017 22:35:28 GMT

Strangely, I don't see how to set it when in P mode.

Re: Autofocus not holding

Waddizzle — Mon, 18 Sep 2017 23:47:35 GMT

@mforster86 wrote:
I'm not sure I entirely understand, do you mean changing it from multi shot to single shot? I can't see any settings for focus just white balance. The camera is a eos 300d

Good point. What shooting mode are you using? Try full AUTO shooting mode, as a test. If the camera beeps when it focuses, then you are in One Shot mode.