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Diaphragm stuck on certain focal length on 20-50mm stock lens

Started Aug 28, 2015 | Discussions thread
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Maluss New Member • Posts: 1
Diaphragm stuck on certain focal length on 20-50mm stock lens
1

Hello,as the title say I have a strange issue with stock 20-50mm kit lens and a NX3000.

From 20 to 24 mm aperture blade stay wide open, if I set the aperture to F/22 or any other values and press the optical preview button or if I take a picture the blades don't move  so I get an overexposed image (if on A mode)

BUT if I'm over 24mm everything works great, diaphragm close as it should (i can see it from the lens and i hear the sound and i get right-exposed images..).

Also If I keep pressed the optical preview button on a focal over 24mm and then change it to 20mm, while the button is still pressed, the diaphgram stay close, but i cant change it.
Things that i have already done:
-Cleaned the contacts between camera and lens
-Firmware Upgrade(both lens and camera)
-Detached battery and microsd for 15 minutes.
- Resetted all settings.
- Cleaned Sd card.
Any advice before sending it to techical service?Those kind of issues are covered by warranty, right?

Thank You.

Nikon 24mm F1.8G ED Samsung NX3000
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