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I doesn't return to it's closed position when the camera is turned off. You have to do it manually . Turn the zoom ring to the 55 position then turn the front focus ring fully to the left.
When the camera is set to autofocus, let the camera do the focusing. If you want to focus manually, turn off the autofocus so you can turn the focusing ring.
Hi - I own this lens and it manually focuses at all focal lengths (hard to see at 18mm unless your subject is extremly close). You may need to get the lens checked. BTW - Mine was set as follows when I checked for you:
This is normal. The zoom ring will stop at each end of the zoom range, but the focus ring will rotate freely, there is no "end" or "stop" to the focus ring.
Are you sure it's the zoom ring that's stuck, and not the focus ring? The focus ring doesn't move when the camera is in autofocus.
If it's indeed the zoom ring that's stuck, you can spend more money than the lens is worth in repairs, or buy a replacement (circa 35 dollars on ebay) for dreadfully cheap. Good luck.
Usually this is a back focus problem; also called a flange back adjustment. If the back focus adjustment is possible on this camera, zoom out wide - open iris all the way - and adjust focus and lock position.
First the auto focus motor is in the body and not the lens so that will not be the problem. Unless you dropped the lens the problem is probably in the focus gear interface inside the lens ( it is stuck in the manual drive --that is why no autofocus-- and there is something preventing normal gear operation).
Seems like a small problem but will require a look at the rear of the lens where the gear box is situated.
There is no secret locking switch. If a little gentle jiggling doesn't free the zoom ring, then I can only suggest you take it in to a reputable camera shop for a Clean-Lubricate-Adjust (CLA).
Yes. Zoom can be controlled either by a variable speed rocker control, or a zoom ring on the lens. Focus is either automatic or manual via a focus ring.
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