The 12-50 is normally a lesser used lens. I think I had used it once in
manual zoom mode and forgotten about it. I'm not sure why since I don't
like that power zoom. I have it set to manual zoom now and will leave
it there. I've also turned "reset lens" to off.
As to the loss of the display on the screen (except review of the image
just shot) that's still a mystery. I thought you had discovered the
reason with: "Not sure, but not unlikely, that a dangling strap, coat,
stray hand, etc. set off the EVF Auto Switch to the EVF." However,
trying this out doesn't completely fit the observations. When this was
happening the screen was completely blank. It's possible to get a
completely blank screen but it requires both that the EVF switch has
turned off the image display AND the info button setting has turned off
all info displays. While less likely that both things were set that way
it was still possible. In fact, I first thought likely. When I started
the shooting sequence I was using the histogram to set the exposure.
Near the end of the sequence I remember being bothered by the histogram
blocking my view and turned it off. That last step actually turns off
all info displays. A perfect setup for losing the image if I
accidentally hit the EVF button. I think that was possibly more likely
since I was shooting vertical with buttons in unfamiliar locations.
However, the final step doesn't fit the scenario since this image/info
setting is retained after power off/on. In the case I was describing,
the image returned after power off/on. I don't recall whether any
shooting info was also displayed. But I suppose I could also hit the
EVF button while fumbling with the power switch (I was using the E-M1)
Thanks for your feedback. I'll just have to do some shooting tests with
the camera and see if I can make the problem recur. If not I'll chalk
it all up to user error even though I can't quite explain it.
Chuck Norcutt
On 4/17/2015 12:28 AM, Moose wrote:
This strikes me as mostly operator misunderstanding/error.
If, as I always do, you use the 12-50 lens in manual zoom Mode, rather
than electronic zoom, powering off and on doesn't change the zoom
setting. Yes, I just tried it to confirm my experience. Even if you used
the power zoom to set up, if you had had pulled it back in to Manual
Zoom Mode before shooting, the zoom setting would not have changed. I
wish there were a way to just disable the Auto option.
Whether the lens maintains focus is a Menu option.
Custom Menu A: "Reset Lens - When set to [On], this resets the focus of
the lens (infinity) each time the power is turned off."
Had you had that turned off, you would still have been focused as set
before. The Mark II manual goes further, saying that Power Zoom lens FL
will also be reset. Whether this is further explication or an added
function of the Mark II, I don't know. But it's simpler, and surer, to
put it in Manual Zoom Mode.
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