Reviews and Problems with Canon Extender EF 1.4x III
Showing 1-4 of 4
Cropping in Lightroom 5 so far is VASTLY superior to this
Jay Dee "James", Amazon
31 January 2015
Summary: So far I am not impressed. Just got this to use with a Canon 70D with a 70-200mm f2.8L and a 400mm f5.6L. works mechanically with the 2.8L "focuses" fast. 400mm f5.6L - will NOT focus in AF mode unless you tape the pins...Canon seriously makes something that wont work with equipment that's this expensive ?? on one Canon chart it will focus one another it won't...
Summary: I am so very disappointed in this product, I am sending it back. I've used it for less than a week, am a professional photographer, and have used this in a) good outdoor natural light b) with a weighted tripod and c) with a still subject and every single image is soft. Sharpness is gone. My lens that I attached this to is the Canon 300mm f/4L IS and I have the Canon 5d Mark II camera. I have used this with ISO 50 with f/stops of 5.6, 8, 11, 16 and 22.
Excerpt: I have now tried two of these Teleconverters with the same results. They both caused softening of the image or reduced quality. I bought my 500MM II with hopes of being able to use this product but sadly disappointed. I tested both under many controlled tests and all results were the same.