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Err 01 Communications btwn camera and lens is faulty. Clean the lens contacts

Ben Quinn , Feb 04, 2008; 07:32 p.m.

Err 01 Communications btwn camera and lens is faulty. clean the lens contacts

I get this error with my 70-200 f/4 L on my virtually new 40D. Any experience of this. Not had this before. I just wiped the contact points with my lens cloth, still no progress.

Responses

JP and AP the glass eye , Feb 04, 2008; 07:55 p.m.

Hello I had the same issue (ER01) with a brand-new-just-out-of-the-box 5D and kit lens. I returned it and Amazon replaced it pronto. If it is new, why not start with a perfect one?

Ben Quinn , Feb 04, 2008; 08:04 p.m.

Thanks, its not new I just bought it used. Not sure of my next course of action. I could return it to the guy I bought if from.

Alan Peed , Feb 04, 2008; 08:42 p.m.

Hi Ben. If the problem is due to dirty lens contacts, this might fix it.

1. Turn off the camera.

2. Locate either an ordinary wooden pencil, the kind that has a rubber eraser on the end, OR, a stenographers correctional pencil, the kind that had a rubber eraser tip and nylon bristles at the top. The goal is to use the eraser to clean the surface of the contacts.

3. In a brightly lit, clean, dry, safe place, remove the lens from the camera.

4. Use the eraser end to gently but firmly wipe over the surface of the electrical contacts and remove old surface oxidation. First, clean the contacts on the Lens. Then, clean the contacts on the camera. As you do this, try to hold the lens and the camera in such a way so that any micro-crud won't fall back into the lens cavity or into the camera cavity.

5. After giving all the contacts a good wiping over with the eraser, try gently blowing them with one of those hand-held rubber blowers. And/or brushing them with nice soft bristle brush. But DONT touch them with your fingers, since that would add oils from your hand to the surface of the contacts.

6. Now put the lens BACK ONTO the camera, BEING SURE that you are using the correct procedure, and that the lens LOCKS INTO place like its supposed to.

7. Now, turn the camera back ON, and see if it passes the Self-Test this time.

Depending on the situation, and the severity of the oxidation buildup, you could also use very fine sandpaper or Emory cloth. You could even use steel-wool, but in this case I would NOT recemmend that, since a piece or two of that steel-wool might drop into your lens and/or the camera cavity and cause you much worse problems.

In your case, I would try the stenographer's rubber correctional pencil first, since it's probably just a shade more abrasive than the eraser on a regular wooden pencil.

If you try this procedure, let us know if it did or did not fix the problem..

AP

Ben Quinn , Feb 04, 2008; 08:43 p.m.

Fixed the problem, forgot to turn IS of the old lens before removing an attaching the new lens. Correcting this solved it. Thanks

Dave Thomas , Feb 04, 2008; 08:53 p.m.

Just a comment...

Maybe thirty years ago, the pencil eraser trick used to be common in the electronics field. Since then, it has been widely questioned as some erasers are relatively abrasive and can damage the thin plating frequently used on contacts. The treatment appears to work in the short term, but longer term it can make the problem worse once the integrity of the protective plating is lost. A cotton swab lightly dampened with alcohol or other fairly benign solvent might be a better idea, at least as a first try.

Just my 2 cents,

DaveT

Ben Bangerter , Feb 05, 2008; 10:11 a.m.

What DaveT said; DO NOT use anything abrasive on gold plated contacts! The plating is thin and easily worn away. [The pencil eraser trick was originally proposed for cleaning circuit board contacts with a (thick) tin or solder plating (seldom seen these days), which will develop a non-conductive oxide surface over time.]

Suzanne Storm , Mar 09, 2010; 02:37 p.m.

I had the same problem today, with a lens I have been using for a while. I cleaned it with the proper cleaning fluid and a cotton bud and all is working well again.

Rory Mole , Aug 16, 2012; 12:34 p.m.

Hi there to you all,
Today I had the same problem with my Canon 40D with the EFS 17-85mm IS lens. I read through the solutions. I didn't have all the stuff mentioned in some of the solutions, but I did have some Eclipse optic cleaning system fluid. As far as I know, Eclipse contains Methanol which I thought would be able to clean the contacts on both the lens and the camera. I then applied a couple of drops to an cotton bud and gently cleaned the gold contacts on both the camera and the lens. Then, after it all dried, I put the lens back on the camera and found that the problem didn't go away. I then did the same thing again and still the Er 01 was still there.
I then remembered a computer geek who told me a story about print cartridges. I once had a problem with a print cartridge on my Epson printer which was giving problems even though it was a brand new cartridge. He told me not to touch with contacts with my fingers, but just before installing, to very, very gently breathe onto the contacts. So I thought, what the heck, why not give this geek's solution a try. It worked for a print cartridge a number of times over the years, so maybe it would work for my lens error.
I then cleaned the contacts again, waited for them to dry and then I very gently breathed on the lens contacts only.
I then put the lens back on the camera and it worked.... amazing.....like magic.
If anyone else has the same problem, give it a try and it will probably work.

Gabriel dazetec , Jul 17, 2014; 12:46 p.m.

Hi guys. Today I recieved "Err 01" on my Cannon 600D. I cleaned the contacts with alcohol and it didnt work right away, but it might have contributed. What I did was to try to take a photo on the minimum aperture (f22), and it worked! After that I saw on some forums that other people have had this problem and resolved it in this way. Just a piece of advice :)

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