Robin,
The reason for your error is that Canon lenses trip a mechanical switch that tells the body to look for electronics. Since the contacts on your teleconverter are mainly for passing through information, your camera will not fire when an EOS lens is not mounted to the other side.
The problem with your converter can be solved by backing your teleconverter off a little bit from the fully locked on position. If you do this, use a piece of tape to make sure the converter does not fall off completely.
One note about teleconverters that mount between your Lensbaby and the body, they only show you the central part of your image, thus cropping out the majority of the Lensbaby effect. A 37mm threaded auxilary telephoto lens that mounts to the front of your Lensbaby will give you the full Lensbaby effect including a small sweet spot of focus.
Regarding the G3 .48x lens, you should be fine using it on your Lensbaby. Only issue is going to be weight. Be careful of leaving it on your Lensbaby when not in use as it will stretch the bellows out and, if they stay bent in that position for a while, the bellows will stay bent. Be careful with that and try not to keep it bouncing up and down on your Lensbaby when around your neck as it may effect the tubing adversely as well.
Whether it is a screw-on adapter or the way you store your lens, anytime you leave your Lensbaby in a bent or stretched position the tubing will tend to remember that position. It should continue to work fine but the relaxed position may be something other than square to the focusing plane.
Have a beautiful day.
-Craig
Post Edited (11-05-04 11:08)
You could not step twice into the same rivers; for other waters are ever flowing on to you.
Heraclitus of Ephesus
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