A quick day out with the Olympus E-M1 and the SONY a7

Started 9 months ago | Discussions thread
Daniel Wee
Contributing MemberPosts: 529Gear list
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Re: Turning off the LCD in the back
In reply to Daniel Wee, 9 months ago

Okay, I did a quick test (@7.6V supply voltage) and the results were:-
1. Average current draw with LCD on = 355mA

2. Average current draw with EVF auto-switched on and LCD off = 335mA

3. Average current draw with auto-switching disabled and EVF on = 325mA

This was tested both with the lens cap on and off. The specific image doesn't seem to make much of a difference to the relative result. I'm also using average current here because, as with most digital equipment, the current draw isn't linear most of the time.

So yes, for maximal battery life - turn off auto-switching and use only the EVF. The upshot of this is that the remaining backlight only incurs and additional 10mA or so. In the worst case, this would represent at most 3% of your battery life. Under normal use, it would be a lot less than this.

 Daniel Wee's gear list:Daniel Wee's gear list
Canon PowerShot SD750 Olympus C-2000 Zoom Nikon D70 Panasonic Lumix DMC-GF1 Olympus E-M1 +17 more
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