MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I love focus pullers but i hate those adjustable rings they come with.
So I decided to make some focus rings to stick on my lenses and have them there for ever.
These rings look an work perfect.
this is v2,
v1 was a bit to tight
This is for a Canon 17-40 L F4
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