105mm micro locking knob non-functional

I recently got ahold of a 105mm f/2.8 AIS micro - wonderful lens. The silver

locking knob, however, does not really lock the focusing ring. It only causes a

slight amount of resistance when tightened down.

 

Is this something that can be repaired? And if so, is it costly?

That's how they are. Useful as teats on a boar hog.

 

Stop your whining.

 

Cheers,

 

Dan

The locking knob on the 105mm f/2.8 AIS Micro that I used to own worked just like yours, not very well. I believe that they are all like this. The locking knob on the 105mm f/4 Micro that I have now works quite well, however.

Ah, I thought that this was a defect, or something was worn out. Good to know. And oh, Dan, no whining involved - just a simple question. :)

Yeah, why should you have the only one that works!

 

Perhaps you know about the performance of this lens at infinity - if not, I'm sure you'll be

pleased when you give it a try!

 

Eric James

 

www.purebredmutt.net

Eric,<br>

<br>

The locking knob should work as you describe or perhaps a little

better but dont expect a positive lock. I removed mine from

my 105/2.8 AIS and stored it in case I ever sell the lens. I

covered the holes with a small pieced of Dymo label tape (old

embossed type) to keep dust out.<br>

<br>

I had a concern that aluminum shards might get into the helicoid

and mess it up. The lock knob also tore up the foal lining in the

camera cases I used at the time. My lens does not creep when on a

tripod so have no need for the lock.<br>

<br>

Best,<br>

<br>

Dave Hartman.

Hi Eric - yeah I've read that the performance is really nice @ infinity. Unfortunately it'll have to compete with my 105mm DC for non-macro useage. :)

 

Thanks for the bit of advice, David. I think I have a small roll of Dymo in the house.

The earlier AIS 105/4 macro has a fully functional locking knob - I rarely use it and it sometimes get locked when I don't need it.

 

Maybe that's why the locking knob on the AIS 105/2.8 micro is only partially functional. I think it needs a modification at a Nikon serice agent to make it fully functional, assuming you need it.