Your camera body likely came with a kit lens, probably the Canon EF-S 18-55mm f/4-5.6 IS STM if you have an APS-C–format body, or the Canon RF 24-105mm f/4-7.1 IS STM if you went with a full ...

But when [Loudifier] needed an extension tube to do extreme close-ups with a wide-angle lens on a Canon EF-M camera, it needed to be small…really small. The final 3D printed extension provides ...

[Dan K] had just such a lens from Sigma, but wanted to get it working fully with a camera using the Canon EF lens fitting. Hacking ensued. The lens in question was a Sigma 15-30mm f/3.5-4.5 EX DG ...