Nikon E Series 50mm f/1.8 lens - Aperture problem

[Slodey]

Hi, I'm new to the board and photography in general!

I've been using my D3100 with the kit lens for a while and managed to pick up a Nikon E Series 50mm f/1.8 lens fairly cheap. However, I think there might be a problem with the aperture on the lens. The aperture ring doesn't actually change anything, meaning that it's currently stuck at f/1.8. The stop-down lever on the back of the lens can be used to close the aperture right down all the way to f/22. The lens ring can then be used to increase the aperture, however it then remains stuck and cannot decrease again. The stop-down lever on the back moves with the ring when this happens, but then doesn't move back down. I don't really know much about lenses, but I can't find anything online that mentions this problem, which has led me to believe that it is a fault.

Am I right in thinking that the lens needs to be repaired? Or is this normal for this type of lens?

Thanks in advance for any help you can offer.

 

[480sparky]

It probably can be repaired, but it will cost far more than just buying another copy of the lens.

 

[Slodey]

Thanks for your reply, I'll get in touch with the eBay seller and arrange a return. Back to the drawing board!