Quote Originally Posted by mongo View Post
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If you see anything - report back. this sort of thing may require a knowledgeable technician in the end. Not sure if we are allowed to make any recommendations on this site in that regard so, Mongo will not for now.

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No problem for any recommendations M!

A couple of easy things to check if you don't have another lens to play with.

Take lens off camera. On the bayonet mount is a small protruding metalic black tab that slides along a short radial arc .. it'll be close to the rear lens element.
if you slide it up and down to it's maximum possible locations the aperture diaphragm will open close. In it's natural position the diaphragm is closed down while the lens is off the camera.

If this is working then step 2:
If the diaphragm is opening and closing with playing with the tab, then when it's placed back onto the camera, if you peer down the front of the lens into the camera, you will see that it's open.

Now, with the camera on, set aperture to something physically small like f/16 or f/22 and still looking into the lens, press the DOFP(DOF Preview) button. If you do this you will see the diaphragm close down on activating the DOFP button.
The DOFP should be the upper function button on the front of the camera on the RHS of the lens(if you haven't altered it in the menu).

If you see an -E- error msg on the top LCD display it means that a card is not installed in the camera(this is mirrored on the lower RH corner of the live view screen too).
Take any card(s) out and re seat them, and see if this helps.

if the lens aperture is operating OK and you still have dark frames and the -E- msg, then it may have faulty contacts or something.
Do you have SD or CF cards? If one type, then try another type and so on.

If the fall was onto hard ground, I dare say that there would most likely be an alignment issue of some type now. it may be small and not really noticeable tho.

Lastly, when you say you get dark picture, how dark exactly? You do realise that the 16-85 is a Dx only lens and that the camera is Fx. Did you reset something and are shooting in Fx mode?
If so, then of course your images will be massively vignetted due to the design of the lens.
But this is corner darkening, not dark overall .. so you will see an image at the centre of the frame, but black edging.

Anyhow, let us know how you go.