Reviews and Problems with Canon Extender EF 1.4x III
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added zoom length
sepat2b, B&H Photo
3 weeks ago
Excerpt: I purchased the 1.4x extender to add zoom lenth to my 70-200 I shoot wildlife and wanted to get closer shoots with out disturbing the animals I know you loss a stop of light but it works extremely well
Pros: Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction
Excerpt: I purchased this teleconverter to replace the 1.4x Mark II version that I had in my kit for the 6-7 years or so. My use for this converter is not typical at all. As an archtiectural photographer, I make extensive use of the new line of Canon TS-E lenses and I wanted to see how well this...
Summary: I own the Canon EF 500mm f/4L IS Lens. Not the version II. The original lens. I also own the 1.4x teleconverter version 1 also. I bought this for bird photography because the 1.4x was not quite close enough to suit me on the smaller birds.
Excerpt: I was skeptical about using an extender but this makes a great deal of difference on my 70-200 f/2.8 II. I was considering a 300mm lens, but really like the fixed aperature and that everything is "internal" to the lens (barrel does not extend or rotate) like my old 70-300 f/4.5-5.6 non-L.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Strong Construction
Excerpt: I shoot a 5D MkIII and information on the extender was not consistent. Some reviews indicated that the extender would not autofocus when used a 100-400L IS lens. I learned in a B&H review that the lens would autofocus if the camera's firmware was updated. This proved to be correct.
Summary: WOW! I looked at the photos with and w/o the extender, and couldn't see any difference! So there is no reduction of image quality, which is awesome. Of course, with the 7D ii, adding it means reducing the focus to only center and surrounding four AF points, but I don't see a reduction of AF speed...
Summary: I use this with my Canon 500mm lens and the images are flawless. Auto-focus speed is a bit slower with this extender but if that's not a problem for you, then this is a great way to get a little extra reach with your telephoto lens without degrading the sharpness of the photograph.