Reviews and Problems with Canon Extender EF 1 4x II
Showing 1-5 of 5
great product space saver
Jeff, B&H Photo
26 December 2008
Summary: I am a professional photographer and the extender comes in handy while shooting movie sets or events from a distance and don't have enough room or muscle to carry the larger primes. It is best used in a situation where you can utilize natural light (alot) or flash. Will not perform well in low light situations, where it decreases the amount of light hitting the sensor.
Summary: I use this extender with an ef70-200mm f/2.8 IS lens on an EOS 40D camera, and primarily shoot motor sports. The magnification is as expected, but comes with a marked reduction in auto focus speed. When shooting a car coming directly at the camera with the extender, the camera hunts for focus about 30% of the time, and is slow to focus on the remainder. With a motorcycle, the hunting goes up to over 50%.
Pros: Sharp Focus
Cons: Hunt for the focus, Slow Focus, Won't work on all lenses
Summary: Bought the Canon EF 100-400mm f/4.5-5.6L IS USM Autofocus Lens and all I have to say is USE A TRIPOD as IS seems too slow drastically at F/6+ and you really need to focus...focus...focus...in low light.But in good light with motionless images that you can't get close too, this is a great way to add 160 to my lens. Expertise: AM Problems Encountered: Reduces IS and causes me to MF ALOT.
Summary: Cet accessoire est très bien construit et ne fera pas honte à vos objectifs même de série L. Sa qualité optique est excellente même si vous perdrez environ une ouverture en luminosité, ce qui est normal et raisonnable. Cependant, vous ne pourrez pas le monter sur tous vos objectifs Canon. En effet, la lentille frontale sort à l'avant du barillet et risque de butter dans le fond de certains objectifs ce qui en empêche le montage.