Compatible with digital EF-S, EF, and TS-E lenses; Canon produces tubes in two different lengths - 12mm and 25mm. The EF12 and EF25 tubes come with electrical contacts which allow data transfer between the lens and camera to be maintained. It is possible to attach the EF12 tube to the EF25 tube to give a 37mm extension. Canon Auto Focus Extension Tube EF 12 II for Close-up and Macro Photography. Canon Auto Focus Extension Tube EF 25 II . ScottieC. Jan 28, 2011 This 12mm extension tube fits between camera body and the lens, providing a brighter image that the Extension Tube EF 25 II. Extension Tube EF 12 II is especially suited for close-focusing with wide-angle lenses. Compatible with all lenses, except 15mm f/2.8 fisheye, 14mm f/2.8L and MP-E 65mm f/2.8. The Canon EF 25mm Extension Tube II is used Anyone ever tried the EF 24-105 with Canon Extension Tube EF 25 II? Nikon Nikkor Z DX 12-28mm F3.5-5.6 PZ VR. Panasonic LUMIX S 14-28mm F4-5.6 Macro. Financing Available. Ideal for photographers on the move, the professional L-Series EF 70-200mm F/4L IS II USM is designed to deliver superb image quality for a range of subjects in a compact and lightweight design. Built to withstand the rigours of professional use, its robust and weather-sealed for durable performance and the constant f/4 I tested with both the 24-70 2.8 ii and 70-200 2.8 ii. Both lenses failed to focus even in manual mode. Not sure what happened? I checked the comment for the unit I bought and it appears to be a common theme, thus I've returned it. Canon does sell extension tube, but the price is 3 times as much a The in-built Ultra-Sonic Motor (USM) drives fast and quiet Auto Focus with optional full manual override. Reduce ghosting and flare with Super Spectra coatings. A circular 8-bladed aperture diaphragm gives out-of-focus regions a softer, more uniform feel. Weighing in at just 290 g and measuring at 73.8 x 50.5 mm. Compare Kenko Auto Extension Tube Set DG 12, 20 & 36mm Tubes for Canon EOS Digital and Film Cameras vs Canon Extension Tube EF 25 II kmV78N.