Extender EF 2X III; Canon’s Shortest and Lightest 70-200mm f/4 Interchangeable Zoom Lens Fast f/2.8 maximum aperture throughout the whole zoom range for The Canon EF 2x II Extender is relatively small and light. It is weather-sealed when used with similarly-sealed lenses and camera bodies. Build quality is excellent - Canon L Lens quality. Pictured above from left to right are the Canon Extender EF 1.4x Converter , Canon Extender EF 2x Converter and the Canon 24-70mm f/2.8L USM Lens . Niveau objectif deux objectifs série L : 24-70 f4 et un 70-200 f2.8. Niveau multiplicateurs, toujours canon : 1.4X EF et 2X II EF. Le 1.4 serait, selon moi le seul à utiliser sur le 24-70 et les deux autres passeraient sur le 70-200. Question bonus : j'ai lu que que pouvait coupler les deux multiplicateur. You also will need to limit your camera's autofocus to the center AF point only, I believe. @ebiggs1 wrote: On your camera the 70-200mm f4 acts like a 112-320mm f4. With a 1.4x converter you are looking at 448mm on th elong end and f5.6. 400+mm should be long enough for you to get some bird shots. Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens with 2X Telephoto Lens, HD Wide Angle Lens and Accessories (8 Piece Kit) 4.6 out of 5 stars 783 6 offers from $183.86 Extenders (Optional) With Extender EF 1.4X ll or EF 2X llattached, the lens specifications will change as follows: Item With EF1.4X ll Extender With EF2X ll Extender Focal length (mm) 98 – 280 140 – 400 Aperture f/4 – 45 f/5.6 – Page 15: Specifications • The size and weight listed are for the lens only, except as indicated. Options. 04-29-2022 07:17 PM. The AF will still work, but AF performance will be compromised. The Full User Guide for the cameras explains “Lens Groups” in detail. The 2x extender fill cause the maximum aperture to change from f/4 to f/8. In this mode you will have only one active AF point, the center AF point. Pre-CES 2010: Canon has released a successor to its professional workhorse fast telezoom, in the shape of the EF 70-200mm F2.8 L IS II USM. Although outwardly similar to its predecessor, the new lens features a revised optical design, incorporating a fluorite element and no fewer than 5 UD elements for the correction of chromatic aberrations. The minimum focus distance has been reduced to 1.2m Y3eYrQ.