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Canon Extenders II vs III

Started Jun 13, 2011 | Discussions thread
Victor Engel Forum Pro • Posts: 20,968
Re: Canon Extenders II vs III

tonyjr wrote:

The 2X II is designed for version II of lenses . It is better on my 70-200 mk II than the 1.4 version one [ kind of grainy on 8 X 10 - OK on 4 X 6's .

I was told even the 70-200 mk II is to old to benefit from the 2 X III . At that time they said the 2 X III MIGHT work on the new 100-400 II , but they did not think it would even fit . They also said there were different versions of the 100-400 , but none would that any 1.4 or 2X without and extension tube and you would loose AF .

I just rented a 1.4x III and 2x III from lensrentals and tried them both on my 100-400 mk II. I'm using a 5DS, so it can AF using an aperture as small as f/8. Unfortunately, the aperture with the 100-400 mk ii with 2x extender is smaller than f/8, so it will not AF except using live view.

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Victor Engel

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