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Canon EF 70-200 F4L lens problem


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Posted: 13 Nov 2004 - 12:38
Bought during travelling in Germany new lens.
Finally when returned back home was badly surprised when found that lens not working.
Checked on both my cameras EOS 3 and EOS 30 got same problem:

Maximum aperture camera showing is 11 (instead of 4).
Aperture range is absolutely strange/wrong
11 13 14 16 18 20 22 25 .. up to 91 .

Auto focus is not working at all you cannot switch it on.
I thing because of aperture reading 11.

Looks that something wrong with inside chip programming.

Unfortunately there is no Canon repairs facilities in area Im travelling now.

Any suggest will be highly appreciated.
Is there any way to re-program/test the lens or the only solution to send it back to Germany?
May be somebody had some similar case in past.

Thank you and regards/Alex
Little Jo
Jo
A keen photographer for many years. Now using EOS digital equipment and well pleased with the 5D MkII.
Posted: 13 Nov 2004 - 16:29
Little Jo (e2 Member) View Mini Bio United Kingdom 8 Years on the site 8 Years on the site 8 Years on the site 8 Years on the site 8 Years on the site 8 Years on the site 8 Years on the site 8 Years on the site
Hi Alex

Sorry to hear of your problems. It sounds like there is a communication problem between the lens and your camera bodies. I'm afraid the only real solution is to send the lens back to Germany. It sounds to me like there's a loose connection somewhere. 'Dead on Arrival' is unusual with lenses, but I would be surprised if the retailer you bought the lens from isn't willing to swap it for a new one. Sending to Canon will leave you without it for weeks, if it's faulty on receipt, I wouldn't accept a repair.

I usually take a camera body with me and try the lens before leaving the store. At least that shows up that sort of thing. You're only gremlin is if it's discovered that the lens has had rough treatment between the time you purchased it and the time you tried it on your cameras eg by being transported in hold baggage rather than hand luggage.

Jo
Posted: 15 Nov 2004 - 08:02
It's possible for it to be a problem with the electrical contacts. Make sure they are clean and free of black "junk". I have found it best to use a cotton swap dipped lightly in isopropyl alcohol and used very gently on the copper contacts.

If you feel at all nervous about doing this yourself, you can take it to any electrical repair shop and they will do it for sure.

Good luck
Michael
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