« on: August 18, 2012, 12:51:28 PM »
I've been a long time watcher of the canonrumors and forum websites. My first post here.
I'm trying to narrow down a problem I am having with my 1D X and EF 180 f3.5 L Macro being used with the EF 1.4x III Extender. If the camera goes into sleep mode it won't wake up by pushing the shutter button. Turning the power switch OFF and back to ON the camera is unresponsive (it won't turn back ON). Removing the lens and Extender from the camera and reattaching them, the camera comes back to normal operation. Also removing the lens from the Extender (leaving the Extender on the camera) operation comes back. (Edit: Turning the camera OFF and back ON before it goes into sleep also results in normal operation.) With the Macro lens alone operation is normal.
I have tried this combination of lens and Extender on my 7D and 5D Mark III and it works perfectly. Using the Extender with my EF 500mm f4 L IS and EF 70-200 f2.8 L II IS on the 1D X, again operation is normal.
Does anyone have this combination of lens, camera and Extender who could duplicate what I am seeing?
I have contacted Canon through E-mails and they don't have a resolution for me yet.
Thanks in advance for any help you may have to offer.