I was recently granted access to a Makerbot The Replicator for a school project and thought i would use this for a few of my own projects.
I’ve long wanted a set of extension tubes for my 550D and in fact i sort of purchased my 70-200 f4 USM for this purpose.
Extension tubes are mainly used to reduce the focus distance of a lens for macro photo.
Through school i’ve probably logged a few hundred hours in Autodesk Inventor for various school projects and so doing an few measurements and drawing a quick first version was not much work.
After a couple of prints and playing around with tolerances i had a couple of working pieces.
An hour playing around with 100mm extension got me these
Better fit, locking, texture and electrical contacts are planned for later versions
The files are available on Thingiverse