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Issue with aperture which opens and closes [Lumix G7, f1.7 20 mm]

Started Mar 8, 2018 | Discussions thread
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pitaszek New Member • Posts: 4
Issue with aperture which opens and closes [Lumix G7, f1.7 20 mm]

Hi guys,

I think this is some issue to my camera/lens.

When I start the camera everything is ok until I target some source of intense light like some lamp or the sun. Then aperture starts to open and close regarding on the object targeted (amount of light probably).

This results in blinking/flashin of the preview on the display and is of course accompanied by the sound of switching aperture.

I don't think aperture should ever change when camera is idle. From what I understand it's set before the photo is taken and reacts only once the photo is taken.

Camera works well on video mode. No flashing, I can control it using dial.

Camera is switched to NTSC from PAL using this service menu trick.

Link to the video of the issue (I think it's an issue) or maybe wrong camera settings:

https://photos.google.com/share/AF1QipNYIGJySm8a57K_rCoXrgBbyb52nISA7YFYI4keftV7AXHEUVVbMmcKkGDbQu6WHA?key=aWtKWlQ0SEV0OEtSUDFTM0g5dVhJVHF2NmU0b2ZRhttps://photos.app.g...43751rQ0YV8FyB3

At the beginnin you can see it flashing when I aim at monitor and take it off of it.

Around sec 26 you can see how it keeps opening and closing without me taking any action besides moving around.

Thankful for any advice on that.

Regards,

Witek

Panasonic Lumix DMC-G7
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