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Frank KavanaghFlag for United States of America

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Why does "busy"show when I try to use the EF 100mm macro lens?

When I attach the Canon EF 100mm macro lens to my EOS 7D, I cannot take a picture.   "busy" show in the viewfinder.   The lens works fine with my EOS 10D and the EOS 7D works with other lenses.
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Try cleaning the contacts on the lens. A pencil eraser is good to clean the contacts.
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On further investigation, the problem now seems to occur with other lenses as well.   It appears somehow related to the WFT.   If I remove the WFT the problem goes away.   I would like to have the system set up so when I turn on my computer, it loads whatever program(s) are necessary to have the images immediately downloaded from the camera to my computer to a specific folder without further intervention on my part.
Avatar of Michael Best
The Transmission range is Approx. 100m/328.1ft from the master camera (Linked Shooting when signal strength is favourable); Approx. 150m/492ft (With no obstructions between the transmitting and receiving antennas and no radio interference, and with a large, high-performance antenna attached to the wireless LAN access point)
Your problem may be due to a weak wireless signal strength, test this by using your camera near the
wireless LAN to see if the "busy" still shows in the viewfinder.
It also could be a fault in your EOS 7D WFT. ( get it serviced / checked under warranty? )

Hope this helps.
I tried it closer to the router, no change.   It seems it occurs when the camera is trying to connect to the LAN.   If I close the EOS utility the camera takes the pictures OK.
Do you have a mac? I've heard there are problems with the 7D and the mac.
It is Windows 7 Professional 64-bit.   As far as I can tell, the problem is related to the Canon EOS Utility and the camera is trying to connect to this program, thus giving the "busy" indication.
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