Lens Adapters, Converters & Extenders. Attach any lens from Canon's huge range of lenses with a lens adapter or increase magnification with a lens converter. Achieve even greater reach with our extenders RF 1.4x and RF 2x. Compatible with RF 800 and RF 1200, our latest RF Super Telephoto L-Series Lenses. There is this compatibility chart for the 1.4X extender III: Canon Extender EF 1.4x Compatibility Chart. It is most definitely compatible with the F4 70-200 lens (I used to use this lens myself before upgrading to the 2.8). Image quality with the Canon is really quite good, and AF wasn't really affected too much. OP. With a mirrorless camera like the Canon EOS R I have no problems using an insane combination of Canon EOS R, EF Control Ring Adapter, Extender EF 1.4x II and Extender EF 2x II, giving the equivalent of a 170-1,700mm f/12-16 lens! This crazy combo isn't the fastest at autofocus, but it still works and is easy enough to hand-hold: 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. Because of the reduction in light reaching the AF sensor, focusing speed will take a noticeable hit. Product description. The Sigma APO Teleconverter 1.4x EX DG for Canon Digital SLR Cameras is a dedicated APO teleconverter that can be mounted between select lenses and the camera body to increase the focal length by the power of 1.4. The multi-layer coating reduces flare and ghosting, which is a common problem with digital cameras. Teleconverters are one of those things people buy when they first start in photography because they sound like a neat idea. However, they soon get put in a drawer and never get used again because they really don't work that well in practice. Designed to extend a lenses focal length by a factor of 2x, the Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. It delivers seamless communication among camera body, lens and extender, and features coatings to minimize ghosting, flare and chromatic aberration. This 12mm extension tube fits between camera body and the lens, providing a brighter image that the Extension Tube EF 25 II. Compact and portable- a great accessory to take when shooting wildlife. Maintains electronic contact between lens and body. £ 83.99. Eligible for free delivery. rvrvU9L.

canon extender ef 2x iii compatible lenses sigma