m_.

Ronald, I see not sign of oil though.

Rodeo, I will further check.

Thanks, Sebastian. I will see how much I would want to play with the lens then. ;)

<p>Although I tried to snap the aperture ring and the blades open and close nicely and adequately, I guess the lens won't communicate with the camera at this pint. So I am declare the defect of the lens...Thanks!</p>

<p>So it appears on surface all is correct. The only thing I can think of then is the lens has "fooled" the camera but never close down the aperture when taking the shot? But why then when I use manual mode, it does close down. Could that be possible?</p>

<p>Oh, I should mention, with this lens, when at f2, the speed is 1/320, but at 16 with the same scene, the speed drops to 1/5. </p>

<p>No overexposure at f2, but the smaller aperture, say f16, is way overexposed.</p>

<p>Hi Shun, I just tried depth of field preview and it does close down nicely. Any other thoughts?</p>

<p>Hi all,<br> I had used a Nikon D600 with a Nikkor AF 35/2 lens in A mode almost exclusively, and then I a few months ago I tried a Tokina 19-35mm AF lens but recently decided to go back to my Nikkor 35 lens, that's when the overexposure occurs, I mean it blows the pictures to no use. I did tried different metering.<br> I initially thought it is the camera, but then it works pretty much spot on with the Tokina lens in Aperture priority mode (and other modes too). So can I say it doesn't seem to be the fault of the camera?<br> Then I thought the Nikkor lens must have gone bad on me while sitting, especially the overexposure seems to occur more consistently when I use the smaller apertures (f8 and smaller). I thought could it be that the lens blades stopped communicating with the camera to close down when needed? On surface, the lens seems to communicate with the camera fine with changing aperture and metering, etc. If I switched to manual exposure mode, it works just fine. So it seems that the lens aperture blades do open and close fine.<br> I am seriously confused. Any idea what might be wrong?<br> Thanks!</p>