help! Question about dust in lens....

I recently purchased a 20-35 2.8 on eBay. I'm normally weary of buying camera equipment on eBay but the seller had a nice track record....The lens was decribed as follows:

"This particular lens is in exceptionally clean condition, with few signs of use. If you look carefully you might find one or two very small marks. The optical and mechanical condition of the lens is equally good, with clear glass and oil free and snappy aperture blades, The lens bayonet shows no wear, and the case is as new. The lens hood is in EXC+ condition, showing a bit more wear than the lens itself"

The lens arrived and upon initial examination, it was as described - exceptionally clean. However after I snapped a quick pic, I noticed something appearing in the pictures. Notice the spot above the tress on the left hand side of the pic...

I took a look at lens more closely and there appears to be dust in the lens.



I just contacted the seller and am awaiting his response. My question at this point is....

1) How expensive would it be to have the Nikon service center at Melville.
2) Are there alternatives to the Nikon Service center than can clean the lens?

Robert

 

I'm fairly certain that it not the sensor....I just snapped some pics with my other lenses yesterday and nothing showed up......

I'll do some more testing tonight.