Overview
Extending a lenses focal length by a factor of 1.4x, Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses.
- It features a built-in microcomputer for seamless communication among camera body, lens and extender; features careful lens placement and coatings to minimize ghosting and flare and even has a new Fluorine coating that keeps soiling, smears and fingerprints to a minimum.
- An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction.
Features:
- Carefully positioned lens release mechanism makes it easy to mount the extender quickly, reducing the time the camera and lens are exposed to the environment.
- Integrated processor communicates between camera and lens and ensures all focusing, metering and ID information is available.
- All optical elements use Canon's Super Spectra coating, reducing ghosting and flare.
- Fluorine Coating on the front and rear elements keeps soiling, smears, and fingerprints to a minimum.
- Sealed to be resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
Maximum Aperture with the Extender - When the Extender EF1.4X III is attached,the lens maximum aperture will be smaller (darker) by 1 stop, with Extender EF2.0X III, the maximum aperture will be smaller by 2 stops. In any case, the camera will compensate the exposure automatically
Panel Features:
Mounting and Dismounting the Extender
- First attach the extender to the lens, then attach it to the camera.
- To detach it, follow the same procedure in reverse
- To detach the Extender from the lens, slide the lens release lever as shown by the arrow, then turn the extender counterclockwise
Specifications
- Focal Length & Maximum Aperture............Magnification: 1.4x
- Lens Construction.....................7 elements in 3 groups
- Max. Diameter x Length, Weight.........2.8 x 1.1 in, 7.9 oz. / 72.0 x 27.2mm, 225g
Note: This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L.