Ok I will try the cleaning technique but I'm doubtful that will work.
This morning I tried it again. 17-40 lens no workie.
Put the 50mm on and works fine. So it is making connection the the hot shoe but only with the 50mm attached.
I'm baffled by this one.
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Canon 7D
70-300mm IS USM, EF 17-40mm f/4 L USM
NiftyFifty f1.8, Speedlite 580ex II
100mm f/2.8 Macro Lens, 18-55mm Kit Lens
My flicka
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