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So what goes wrong with AF-S sonic motors?
OK the first lens the AF-S 28-70mm F2.8 lens is now repaired and working fine!

Frankly they are fiddly to work on and certainly difficult to understand how to dismantle, someone had already been in there and mashed a crosspoint screw and went no further.
Like the AF-S 70-300mm VR that I repaired before I didn't find much wrong, checked out the distance scale which is poorly mounted....the motor squeaked when turned by hand. The aperture lever/mechanism is baffling as I couldn't understand why the lens stayed half open when unmounted.....+4 glass and a head torch showed the mechanism was two levers that had to be parted.......not in the least bit obvious.
I also raided three dud SLRs and stripped the for springs screws etc.

Re-assembling the AF-S 80-200mm F2.8 is a more serious job with a lot more stuff to I'll go in there in the next few days!

Oh onward and upward!
Dave's clichés

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RE: So what goes wrong with AF-S sonic motors? - by davidmanze - 05-08-2018, 03:24 PM

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