a4 AF-on versus shutter/AF-on

Started May 16, 2012 | Discussions thread
Regular MemberPosts: 300Gear list
Re: a4 AF-on versus shutter/AF-on
In reply to kliang, May 16, 2012

(1) If the target is already in focus, you may not feel the movement of the focusing mechanism.

(2) Did you keep on pressing the AF-ON button to keep the focus? The AF-ON button is not a toggle button. I would prefer to have an option to set the AF-ON button as a toggle button, like the AE-L button. Under some situations, such an option would make life a bit easier for me to take a photo with myself in it.

kliang wrote:

When I select a4 AF-ON only mode in d800, I am not getting focus responses after using the camera for just a little bit. That is, the lens and image will not change focus after pressing AF-ON couple times. Switching back to Shutter/AF-ON makes it responsive again. What is happening here? Is my AF-ON defective? This is happening to both 50mm 1.8g and 70-210mm af-D lenses.

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Pentax Optio RZ18
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