Jump to content


Stuck extension tubes/adapters

Recommended Posts

Now we all know that you're not a self-respecting imager until you have a drawer-full of stupidly expensive adapters/tubes/doo-hickeys. The one that you need for the task at hand will naturally be cold-welded onto something else and no amount of swearing at, threatening, brute force, strap wrenches, heating or cooling will separate. 😡 Naturally, you will be forced to buy another over-priced bit of aluminium and delay the job until it arrives.

To prevent this, try this stuff:




Its normally used by locksmiths to free up sticky locks. Yes, you can rub a pencil on the threads, but if your house is anything like mine, pens and pencils seem to magically disappear.

I've heard of other solutions- shoe polish, being one, or anti-seize compound. I personally don't like the idea of wet or volatile lubricants being used near optical surfaces in case they creep or off-gas. Too much chance of getting them on fingers and transferring them somewhere that they shouldn't be. The beauty of graphite powder is that it is dry and if any gets on an optical surface then a puff from a blower bulb will soon dispatch it. And, at less than a fiver for a bottle that will last decades, it'll probably be cheaper than buying pencils.



  • Like 1
  • Thanks 3
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.