Quote Originally Posted by Ole
Look at my avatar...

That's a 5x7" Technika: Left hand on strap, right hand under the bed while fiddling the focus knob. Problem is finding a third hand for the dark slide, and a fourth for the cable release!
I suppose you could learn to pull the dark slide with your teeth. And then, how about an electro-mechanical shutter release you could short out with your tongue?