Repair question

<Does anyone have any experience in repairing nikon objectives?> I do...it begins with opening my wallet, esp as it relates to the Silent Wave Motor of an AFS lens, such as yours. Not be be cute, but if I can't 'fix' something with a hammer then I won't be fixing it.

In response to your other questions, the focus *sensor* is located in the D100. The D100 communicates electronically with the lens, commanding it to focus nearer/further. The lens elements are driven by the Silent Wave Motor, which is located in the lens (vs. the 'screw-driver' motor located in the body).

Before parting with a penny you may want to get a phone-estimate for an r-n-r (remove and replace) Silent Wave Motor. Depending on the condition of the lens and cost of Motor (assuming the Motor went south), a new lens w/ warranty may be the preferred option. Incidentally, how is the manual focus performance in terms of feel and imaging? Can you be sure other electronics and aperture mechanism/blades are unscathed? Added insult-to-injury would be to pay shipping, learn of the true repair cost, then purchase a new lens.

I recently gave a 28-70/2.8 AFS a make-over via Nikon Service in El Segundo, CA. They did a fair bit of work, an excellent job, in timely fashion for what I feel was an honest price. No complaints. I'd offer info on the price of the Motor but neither my estimate nor bill is itemized...just one lump-sum.

Thank you for the quick answer, but I approach this question a little differently. I deal with microcontrollers, and own a repair shop. After the lens got wet, it didn't do anything. I desoldered all the microcontrollers, cleaned the pcb under, and the micros as well. Then it started to work, but very slowly and after a few turn it stops. I feel like as if an overcurrent protection stopped the motor. I only would like to get some info on repairing this unit. Any help is appriciated.

Has anyone else sent in lenses like the 28-70/2.8 AF-S for repair? Any time I need a major out-of-warranty repair, the estimate seems to be about 1/4 the cost of a new lens.

Peter - Try contacting Nikon tech support and see if they'll provide the information. You can get there by following links through nikonusa.com

The lens does have a 'CPU' that gives the camera information such as what kind of lens is mounted (at a minimum maximum aperture and current focal length) and what distance the lens is currently focused. As previously mentioned, the camera makes the decision about whether or not the lens is correctly focused and tells the servo which way to turn.

I live near the Nikon repair center in Farmingdale, NY and have used their drop off window. As I mentioned on a previous posting which may not have made it after all; I experienced an AF failure on my 60mm MicroNikkor. It cost me about $140 to repair since it was out of warranty and it took about 2 weeks for the to be ready. I am lucky to be able to pick it up at their repair window so I don't know about shipping/handling. I did have a different experience with my 135mm F:2 manual lens, I managed to get some scratches on its rear element and Nikon could not repair it claiming that they no longer have the rear element replacement lens part and if they did manage to find one it would cost about $250. Hope this helps.

Thanks for everyone!