How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Russell A. Your Own Question

Russell A.
Russell A., Camera and Video Technician
Category: Camera and Video
Satisfied Customers: 5011
Experience:  30 years of experience as a TV station technician gives me a unique understanding of technical equipment issues.
24675295
Type Your Camera and Video Question Here...
Russell A. is online now
A new question is answered every 9 seconds

I have a out-of-warranty 12-60, and I'm considering

Customer Question

I have a out-of-warranty 12-60, and I'm considering performing the partial disassembly and cleaning discussed here discussed here (I've has success with similar repairs on other lenses):
http://www.dpreview.com/forums/post/32995ill
What is the correct method to remove the trim ring?
Submitted: 1 year ago.
Category: Camera and Video
Expert:  Rick replied 1 year ago.

Hi. My name is*****'m a camera repair technician with over 20 years in the business and I'll be glad to help you with your question today.

If you've never taken a lens apart before, I wouldn't recommend it. Even simple disassembly can get complicated fast. There are services available that can do this professionally at a reasonable price and they warranty their work.

Customer: replied 1 year ago.
Hi Rick,As noted in my question, I already HAVE succeeded in several lens repairs, so advice not to try is NOT what I'm looking for (I can gety LOTS of that over of dpreview for free).
Expert:  Rick replied 1 year ago.

The reason I suggested a professional service is the need for specialized tools. Some trim rings need a spanner wrench ti remove while others require a cupped, rubber stopper. These are common tools for a camera technician but not the average person. Do you have the tools necessary to disassemble this lens?

Customer: replied 1 year ago.
Rick,Did you check out the link I included in my original question?Per the disassembly steps illustrated there, neither a spanner nor a rubber stopper set (both of which I have) are required for disassembly sufficient to access the rear of the front element.What the poster of that link does NOT know is method that allows removal of the trim ring without marring it. (Based on that link it *appears* that the ring is adhered to the component behind it, rather than being friction-fit or screwed into place.)What I need is advice on the tool and/or method to remove and reattach the trim ring without damaging the ring or the components behind it.Best,***** *****
Expert:  Rick replied 1 year ago.

If you haven't done so already, use some alcohol to soften the adhesive under the trim ring. This works well for me and doesn't damage wither the ring or the lens. You sound like you know what you are doing but if you need further assistance, Just Ask.

Customer: replied 1 year ago.
Rick,Thanks,Nope.... I DON'T know what I'm doing, that's why I'm looking for advice ....I just try, generally, to hang out at the low end of the Dunning-Kurger scale:https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect___________________________________________1) So... a drop or two of isopropyl alcohol spread around the outer circumference of the trim ring?2) And then... what would you suggest to lift it? (In the linked example, the dental pick marred the trim.)3) And then... what to use to adhere it back down?Thanks,***** *****
Expert:  Rick replied 1 year ago.

Hi Michael. Sorry it took so long to get back to you. Have you found something to remove the trim ring yet? I normally use dental picks or other tools I've found that work. If you need to, use more alcohol to loosen the adhesive. It won't hurt the lens s you don't need to go sparingly.