more links

http://kotisivu.mtv3.fi/mr/ds/ds_combinations.htm

http://www.3ge.com/pix/digiscoping/digiscoping.html

I can't find the lens size and "Lens Adapter UR-E8" thread sizes for the nikon 5700, but I feeel that camera has a large looking lens( gives hope to you using your present camera)

EDIT...... Lens Adapter UR-E8 gives you a very unpopular 50mm thread 5 more mm and Royce Howlands at your size ;)

Is there an adapter for your camera that goes SMALLER, otherwise a step down might be needed..... and a bracket to hold everything together ;)