Today, I discovered how to do this at... shhh... Flicker! Someone there mentioned that he had simply removed his 50mm lens, reversed it and then held it in place. I tried the technique this afternoon; it works! I will be posting an example using this method later this week... I also found out that I must use a tripod (and didn't have one with me!) Try it out if you hadn't heard of this before now.
Its not really a secret :) you can get lense adapters to reverse your camera lense for most digital DSLR cameras, for use as a macro, an very low priced.
Yes, Moose! You are right and so is Steve. Steve says the adapter is low priced... Jerry says he got one for $7.00... so the price is indeed low! I must, like Jerry, experiment.
Thank-you both! And the fact that adapters are available screams to me that this 'trick' has been around for some time.