Canon EF 100-400 mm 1:4.5-5.6 L IS Lens Connection (not the II)
Aug 27, 2017 09:28:33 #
Hi everyone, I have had the Canon 100-400 for 2-3 years and I have been very challenged with the connection to my Canon 7D Mark 11. The connection will frequently fail when I pull up the camera to photo BIF, stills on monopod, good weather and bad weather. I have cloth-cleaned the connections on the lens and on the camera and air cleaned them after. It doesn't happen with my 24-70mm Canon L lens. The only way to get the camera to work again is to turn it off and back on and start over with my focus, etc. Anyone else have these issues with this lens? If so, how did you fix it, please?
Aug 27, 2017 09:40:05 #
Aug 27, 2017 09:59:59 #
Aug 27, 2017 12:06:47 #
The 7DII had one firmware update specifically for AF issues. Have you confirmed you have the most current updates applied to the camera? If yes, you should consult Canon as there should be now issues in using these two models together.
Aug 27, 2017 13:39:00 #
PMW603 wrote:
Hi everyone, I have had the Canon 100-400 for 2-3 ... (show quote)
I used a 100-400L mk I on my 7DII with no problems. It also works fine with my new 100-400L mk II. The only lens I had problems with on the 7DII was my Tamron 150-600 (first model). It had trouble with AF, Tamron and Canon both came up with solutions in the form of new firmware. I sent my lens off to Tamron and they updated the firmware as well as tuning it for the 7DII (it already worked great with my 6D) and I installed the new Canon firmware myself, no problems after that.
However as to cleaning the contacts, if they are covered with grime or such just rubbing them might not get it off. There is the old pencil eraser trick, but that might damage the contacts if you use too much pressure and then you have to clean off the eraser particles. I use electronic contact cleaner with a Q-Tip. Dab a damp Q-Tip on the contacts, let stand a bit then rub with a clean microfiber cloth and blow off with air.
Aug 27, 2017 13:54:31 #
Thanks, I will connect with Canon about this issue. I had the camera and lens at my local reputable camera shop and they said it was up to date and they cleaned the camera connections again. But if they can't replicate the problem while it is in their hands, it is really hard for them to trouble shoot. My clue to it being the Lens and not the Camera is that it doesn't happen with my 24-70mm Canon L Lens.
CHG_CANON wrote:
The 7DII had one firmware update specifically for AF issues. Have you confirmed you have the most current updates applied to the camera? If yes, you should consult Canon as there should be now issues in using these two models together.
Aug 27, 2017 14:05:12 #
PMW603 wrote:
Hi everyone, I have had the Canon 100-400 for 2-3 ... (show quote)
Pmw, I might have a similar problem with an 85mm. Once in a while the viewfinder goes kinda dim and nothing happens. I attribute it to dirty or faulty connection but have never cleaned it.
I just grab the lens and turn it back and forth 4 or five times and everything works again. It probably moves a 1/16th of an inch while coupled.
I don't turn the camera off or remove the lens.
BUT, I'm shooting static portraits, not BIFs, so yes, that would get annoying very quickly!!!
SS
Aug 27, 2017 14:25:47 #
PMW603 wrote:
Hi everyone, I have had the Canon 100-400 for 2-3 ... (show quote)
It's possible you could have a flex circuit inside the lens, starting to fail. Could be intermittently interrupting communication and hanging everything up.
Aug 27, 2017 14:34:02 #
That sounds like a "send the Lens in to Canon" type of repair job. I have a trip coming up in two weeks to Banff and want to have access to my 400 mm capabilities.
travisdeland wrote:
It's possible you could have a flex circuit inside the lens, starting to fail. Could be intermittently interrupting communication and hanging everything up.
Aug 27, 2017 16:11:57 #
PMW603 wrote:
That sounds like a "send the Lens in to Canon" type of repair job. I have a trip coming up in two weeks to Banff and want to have access to my 400 mm capabilities.
I would definitely call the Canon Customer support line and discuss this problem with them-especially considering how close your trip is. They might be able to help you solve this without sending the lens in, though I believe that will ultimately be the solution. Good luck with this, and please, keep us posted.
Aug 27, 2017 17:24:53 #
Thanks so very much ... I'll call them first thing in the morning.
travisdeland wrote:
I would definitely call the Canon Customer support line and discuss this problem with them-especially considering how close your trip is. They might be able to help you solve this without sending the lens in, though I believe that will ultimately be the solution. Good luck with this, and please, keep us posted.
Aug 27, 2017 17:47:13 #
PMW603 wrote:
That sounds like a "send the Lens in to Canon" type of repair job. I have a trip coming up in two weeks to Banff and want to have access to my 400 mm capabilities.
I don't think Canon will work on that lens. It's likely out of service life by now, and if so, they probably won't touch it!!!
SS
Aug 27, 2017 18:23:23 #
Do you have personal experience with them refusing to work on a lens or camera that they have updated to Mark 11? My 24-70mm Mark 11 by Canon is a newer lens and they worked on my lens, a non-warranty covered problem, free of charge and returned it to me in due course. I connected with them two weeks ago about my original problem, decreased focus capabilities at 100 mm, and they sent me the shipping documents. It seems to me that they planned to take a look at my lens ... I chose to delay sending it in because I needed it and the lens problems are becoming worse. Please let us all know if a mfg is refusing to work on one of its best lenses.
SharpShooter wrote:
I don't think Canon will work on that lens. It's likely out of service life by now, and if so, they probably won't touch it!!!
SS
SS
Aug 27, 2017 18:27:50 #
PMW603 wrote:
Do you have personal experience with them refusing... (show quote)
they'll still work on it-hasn't been that long that the mkII came out!
Aug 27, 2017 19:03:30 #
Thanks, I thought so since they sent me the shipping labels ...
travisdeland wrote:
they'll still work on it-hasn't been that long that the mkII came out!
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