DPReview.com is closing April 10th - Find out more

Question: camera opens up and closes down aperture automatically during focusing/metering?

Started May 24, 2016 | Discussions thread
Danielvr Veteran Member • Posts: 6,863
Re: Question: camera opens up and closes down aperture automatically during focusing/metering?
1

I set my Panasonic 14/2.5 to f10 and tried to take a picture in A mode. When I point the camera to a dark area of the room, it seems that the camera opens the lens up automatically. When I point it back to the object, it closes down the aperture. All of these without me touching any control.

Is this how it is supposed to work?

Yes. It's meant to keep the viewfinder's brightness more constant. I don't know about the E-M10, but the E-M1 has a setting "Flicker Reduction" (Menu->Gear-D->Flicker Reduction) that can be turned off if the aperture's 'rattlesnaking' (as some have called it) should bother you. Maybe the E-M10 has a similar setting.

 Danielvr's gear list:Danielvr's gear list
Olympus E-M1 Olympus Zuiko Digital ED 12-60mm 1:2.8-4.0 SWD Olympus Zuiko Digital ED 50-200mm 1:2.8-3.5 SWD Carl Zeiss Planar T* 1,4/50 Panasonic 20mm F1.7 II +2 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow