Hardware does not correspond to my expectations of quality
Set of professional automatic extension rings for Canon EOS EF / AF - * 3 rooms: 13 mm, 21 mm, 31 mm * Bayonet - for Canon EOS 100D 700D 1000D 1100D 650D 600D 550D 500D 450D 400D 350D 300D 70D 60D 50D 40D 30D 20D 10D 5D 6D 7D 5D Mk II 1D 1Ds Mk II 1D 1Ds Mk II 1D C 1D Mk II N 1D Mk III 1Ds Mk III etc. (Electronic devices) 1
Set of professional automatic extension rings for Canon EOS EF / AF - * 3 rooms: 13 mm, 21 mm, 31 mm * Bayonet - for Canon EOS 100D 700D 1000D 1100D 650D 600D 550D 500D 450D 400D 350D 300D 70D 60D 50D 40D 30D 20D 10D 5D 6D 7D 5D Mk II 1D 1Ds Mk II 1D 1Ds Mk II 1D C 1D Mk II N 1D Mk III 1Ds Mk III etc. (Electronic devices)
I typed on the site "Canon extensions tubes", and the answer was that material. I ordered through Amazon, I am fully satisfied with the delivery service. Alas, this material is not of the Canon brand. The assembly of the three rings is inaccurate, it is indeed a game in micro-slides, three chrome valves that separate the "bringuebalent" and emit a clicking sound when shaken overall. Mounted on my Eos 600D with my 400mm, I found that all was unstable. However, having made three pictures for testing, I found that the connections were made, my images are properly exposed.
I made this material, in my opinion does not deserve the "professional" label!