Canon EOS EF/EF-S mount 12 mm 20 mm ir 36 mm

Adopts metal bayonets with gilt metal contacts
Designed to enable a lens to focus closer than its normal set minimum focusing distance.
Ideal for macro photography, designed with all the circuitry and mechanical coupling to maintain auto focus
With 12mm, 20mm and 36mm lengths tubes, each lengths tube can be used individually or together, with 7 different combinations
For Canon EF/EF-S Mount DSLR Cameras – 1D X Mark III, 1D X Mark II, 1D Mark II N, 1D Mark III, 1D Mark IV, 1D X, 1Ds, 1Ds Mark II, 1Ds Mark III, 1Dx Mark II // 10D, 20D, 20Da, 30D, 40D, 50D, 5D, 5D Mark II, 5D Mark III, 5D Mark IV, 5Ds, 5Ds R// 6D, 6D Mark II, 7D, 7D Mark II // 60D, 60Da, 70D, 77D, 80D, 90D // 100D, 200D, 300, 300D, 300V, 300X, 350D, 400D, 450D, 500, 500D, 550D, 500N, 600D, 650D, 700D, 750D, 760D, 800D, 850D // 1000D, 1100D, 1200D, 1300D, 14000D, 1500D, 3000D, 4000D etc.