Reviews and Problems with Canon Extender EF 1.4x III
Showing 1-10 of 18
Good extender. Big caveat.
Johnny Questionable, B&H Photo
1 May 2015
Excerpt: This extender really stretches the reach of my 400m F5.6L lens with little noise and very good overall quality. But the lens won't autofocus with the extender. I suspect the incompatibility is with the Canon 60D body.
Excerpt: I have Canon 70D and a EF 100-400mm 1: 4.5-5.6 L lense. The optics was good when taking some pictures of birds and a sunrise from a distance. However, the AF did not work. I read all the literature and based on that I thought the AF would work.
Summary: I won't go into extensive detail on this item, but it's important for anyone considering buying this to know that the number of lenses for which this is compatible is very limited! Look into the list before you buy! None of my Rokinons are compatible and my Canon 24-105 isn't either.
Summary: If teleconverters were truly 1.4x extenders then Canon would surly go out of business because it would make no sense to buy longer focal lengths. Although I am no photo novice I had expected better quality photos and thus I can only offer this advice to you: If you are intending to have small prints...
Pros: Well constructed and extends your zoom by 1.4x. I paired this extender with a Canon 300mm f4 & Canon 6D and loved the reach (effective 420mm). I was able to capture some candid moments which would not have been possible with my 300mm
Cons: The photos I took looked great on the camera LCD and my 12in Surface pro 3 (2160 x 1440) but when seen on my 27" Samsung SB970 (2560 x1440) where I often display my photos at work I immediately noticed how terrible these photos were by comparison to my 300mm f4 without the teleconverter. The tele...
Summary: Right now it causes me to lose autofocus and that is a no-no for wildlife photography. I got it for one rare day when I spot the Yeti far away and I don't have enough reach. Who would believe my Yeti photos if they were crop-zoomed and noisy?
Only M Focus with 1.4 Extender on Canon 6d/EF100-400 combo
14 November 2013
Summary: I purchased the Telephoto converter for my EF 100 - 400 zoom lens which I use on a Canon 6D. Turns out Autofocus does NOT work which makes the converter practically useless to me. Once I add the converter to camera, focus mode shifts to M Focus. Reviews I read did not suggest this to be an issue.
Excerpt: I bought the 1.4 Extender III because I was so impressed with the 2x Extender III's vast improvement over the 2x Extender II. But I found little if any difference between the 1.4s. I am using it with version II lenses and a 1DX, so it isn't a matter of features support.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus
Excerpt: I have had this extender for about a month. As previously stated, autofocus DOES NOT work with this extender and Canon's EF 100-400L telephoto lens (I have a Canon 60D camera). I can only speculate that the design of the 100-400L is too old to have the autofocus be compatible with the new EF 1.4X...