Extension Tubes for Canon EF mount – Part 1

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.

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