An extension tube is a simple way to turn your existing lens into a macro lens. This Fotodiox extension tube will work with all Canon EOS cameras, digital or film. This tube set includes a lens-coupling ring and a body-coupling ring; three extension tubes of various sizes are also included to build up to the desired magnification. Specs are based on a 50mm f1.4 lens. Compatible Cameras (including, but not limited to) Canon 1d/1ds, Mark II, III, IV, X, C, 5D, 5D Mark II/III, 7D, 10D, 20D, 30D, 40D, 50D, 60D, 60Da Rebel xt, xti, xs, xsi, t1i, T2i, T3, T3i, T4, 300D, 350D, 400D, 450D, 500D, 550D, 1000D The extension ring set has no electrical contact, so you will have to set your camera in manual focusing and manual exposure, or aperture priority mode for metering.