Help! Slow opening and closing aperture blade: Nikkor 17-55mm f2.8

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Min87 New Member • Posts: 2
Help! Slow opening and closing aperture blade: Nikkor 17-55mm f2.8

Hi all, i bought a used lens (nikkor 17-55mm f2.8) yesterday and find out that the picture take at f2.8 and f22 are about the same (maintaining same shutter speed and ISO between 2 shots).

I dismantle the lens and check on the rear aperture blade lever. I pull the lever to the end and let go to check on the spring tension. I notice that it behave slower when it returning to the initial position, as compare to my new lens which return to the initial position in a blink of eye.

I also set the shutter speed to 10sec @ f22 and see how fast it stop down to f22. And yes, it still slower as compare to my new lens.

I would like to know anyone who experience this before and would like to know the cost of repairing. I bought this used lens @ $480. Is it worth to send for repairing?

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