Canon 1.4 Extenders - Any Real Differences?

The "old" Canon 1.4x II can be had for about $200 less than the new 1.4x III. Anyone do a side by side comparison? Is the III worth the price?

Depends on what lens you will be using it on and, of course, your expectations.

I was wondering the same thing... How would they compare on a 70-200mm 2.8L or a 24-70mm L? I dont have any primes, so mainly the zooms. Is there a noticeable difference to warrant the extra $ between the 1.4x II & III?

Racer997 wrote in post #11900699
The "old" Canon 1.4x II can be had for about $200 less than the new 1.4x III. Anyone do a side by side comparison? Is the III worth the price?

Definitely, for the color alone.

The old one is very light beige, the new one is very light grey.

Much more 21st century.

Seriously though, the digital picture review shows slight advantage for the III. Not sure if it is $200 worth though.

The MKIII converters are supposed to work better on the new super-teles, less of a difference on older lenses.

One thing I don't like about the new ones, is that they're NOT stackable without putting an extension tube in between them.

The series II TCs are stackable.

If I could afford any of the new series II telephoto lenses, I'd spring for the new series III tele converters for the best possible image quality. But I'd also purchase a pair of the series II TCs, just in case I'd ever want to stack them for an even longer focal length.

There are differences, it (apparently) depends on what you're using them with.

http://www.the-digital-picture.com …der-EF-2x-III-Review.aspx

Anyone getting by using the 2x on a 70-200mm 2.8IS MARK 1? I'm wondering can I get by with that setup for a few years for some soccer/ birding

Since I also have the EF 100-400 mm f/4.5-5.6L IS USM, I decided to stop at the 1.4x extension for my EF 70-200 mm f/2.8L IS II USM. This is intended to give a bit more reach than what just 70-200 mm can provide, when I feel that it's beneficiary and logistical problems may prevent me from also bringing the 100-400.

Around the house I've mainly used the extender on the 100-400, since here I can just as well change the lens instead, if I want something longer than 70-200 mm. But the extender seems to give good result on the 70-200 as well, when I use that.

What about a 2x?