So I have a telescope which I use a T-Ring to EOS adapter with. Like everyone here who shoots (really) far away things, I like attaching my Canon Teleconverters to it. However, with the 5D3 + Telecoverter + T-Ring adapter, the camera won't take a picture and instead complains not being able to make electrical communication with the (non-existent) EF lens that should be attached to the teleconverter.
Is there a way to disable that error message? If the body doesn't have any lens/teleconverter attached to it, it takes a photo just fine. However, with just a teleconverter, it doesn't. I've been using tape on the contacts to trick the body to taking photos. I use the teleconverter with my 70-200 as well and I dislike having to constantly put/remove tape on the pins... This process is such a hassle, there's got to be a better way.
I looked in the manual and nothing jumped out at me screaming this is how you fix it... any thoughts?