5DII metering mode and exposure lock question

Started Jun 24, 2009 | Discussions thread
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Re: 5DII metering mode and exposure lock question
In reply to Martin717, Feb 1, 2013

Martin717 wrote:







Like many photographers I use the central AF point only, focus on the subject, half-press shutter button, and the camera locks focus and exposure, and then I recompose before taking the picture. This works with Nikon for instance. But with Canon it works only if you choose "evaluative metering". So why does Canon differently in "partial", "spot" and "center-weighted"?

This Canon-only behaviour is - since many years! -

a) undocumented, because it's not mentioned in the manual;

b) counterintuitive, because most (maybe all) other manufactures (e.g. Nikon) work differently and because changing the metering method should not have an effect on *when* metering is locked;

c) really irritating, because I am forced to use the * key if in "partial" metering mode which is just one key press too much.

It's funny... I didn't even realize that the 5D2 could AE Lock with shutter-release without using AF-On.

I just tested this, and sure enough, with Evaluative Metering and shutter-release AF, the exposure is being locked with shutter-button half-press but the viewfinder doesn't even show the * or any other indication that the exposure is being locked when in fact it is. To me, the lack of indication is the bigger sin here.

I'd always assumed it was impossible on the 5D2 to AE-lock with shutter-release half-press without using AF-On, as I'd never seen the any such option in the menus, any documentation, or any indication that this was happening.

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