Just posted: Canon EF 200-400mm f/4L IS USM Extender 1.4x review

Just posted: Our quick review of the Canon EF 200-400mm f/4L IS USM Extender 1.4x: the world’s first SLR lens with a built-in switchable teleconverter. It’s been two years in the making, but when Canon offered to show us a production version of its professional super-telezoom, we couldn’t help but be intrigued. In this review we’ve teamed up with DxOMark to bring you full optical test data of this unique lens, backed up by some quick real-world examples. So how does it perform? Click below to find out.

Click here for our quick review of the Canon EF 200-400mm f/4L IS USM Extender 1.4x

Click here for DxOMark’s review of the Canon EF 200-400mm f/4L IS USM Extender 1.4x

Canon EF 200-400mm f/4L IS USM Extender 1.4x

Comments

the real t-stop is 4.7 not 4

We will see many pro use this lens in next year’s Winter Olympic game and WorldCup.

…Now, where did I put that card from those thick-accent, dark-glasses nice gentlemen I met in a parking lot, the other night…What was the outfit name again…?…”Less Kidney 4 Fun”?…”Kidneys’r’Us”…?…Darn, my memory isn’t the same it used to be…

Dear Santa…

Nice lens. If I win the Euromillions I’ll put my name down for one.

Nice glass.