Well I dug out some old kit for a try.
I had to attatch a 12mm tube to clear the prism housing to allow the bellows to fit. The lens used is a manual focus Nikkor 105mm f2.5 lens. Not a macro lens though as I traded my Micro Nikkor 55mm for this one years ago.
The biggest problem with working at these extensions is focusing. You really need a micro focusing rail. I used my model lath as the suject and my milling table to achieve the function of a micro focusing rail.
At these magnifications imperfections of the subject become critical. A grain of dust can look like a boulder in the image.
Due to the number of images I will spread this over two posts.
The images here are to show lens to subject distance with a 105mm lens at both ends of the extension, and the effect of magnification on undesirables.
Link to an image from Harry's gallery that is high magnification but
clear of any such undesirables
http://www.worldphotographyforum.com...500&ppuser=150
The next post will show the degees of magnification.
Don