New Canon 100-400mm II Lens with 2x III CONVERTER: Will this combo autofocus...

ronjay Loc: york Pa.

Will this combo autofocus

imagemeister Loc: mid east Florida

No .....unless you have a very unusual 7D II, 5D III, or 1DX - and you tape the pins.

davidrb Loc: Half way there on the 45th Parallel

ronjay wrote:

Will this combo autofocus

Canon's position with the "old" version of this lens in NO. The reason being the aperture it too large to support the T/C. f/4.5 with the T/C becomes f/9 and Canon says no to that. However, some combinations do work above f/8 with some help. The EF500mm f/4.5 USM will AF by utilizing spot focus and live view. Canon refuses to give thumbs up or thumbs down, only to say OK.

As far as the new version of the lens Canon says it will work with both 1.4x and 2x but versions II, not III. According to several Canon users quoted in the catalogue the lens will not AF using the 2x.

Keep in mind that certain cameras will AF under circumstances that will not allow another camera to do so. The 1 Dx will AF under circumstances that the 5 D MkII will not. From what is written at this time it appears the only way for you to answer your question is to get a copy and try to AF at apertures above f/8.0. GL.

ronjay Loc: york Pa.

Thanks

SharpShooter Loc: NorCal

imagemeister wrote:

No .....unless you have a very unusual 7D II, 5D III, or 1DX - and you tape the pins.

As far as I know, and I have not actually tried it, the pins on the 2x can not be taped or at least it doesn't work. Don't know if it has to do with the light or the electronics. Only the 1.4x can be tapped.
Again, I have not done it but that's the rumor with the old bodies.
Has anybody tried taping the pins on 2x on the new bodies?? ;-)
SS

Peterff Loc: O'er The Hills and Far Away, in Themyscira.

ronjay wrote:

Will this combo autofocus

Here's the lens manual from Canon's web site:

http://gdlp01.c-wss.com/gds/6/0300017486/01/ef100-400f45-56lisiiusm-im-e.pdf

Except for people with that special magic touch it doesn't look as though the prospects are good for AF with any extender.

oldtool2 Loc: South Jersey

SharpShooter wrote:

As far as I know, and I have not actually tried it, the pins on the 2x can not be taped or at least it doesn't work. Don't know if it has to do with the light or the electronics. Only the 1.4x can be tapped.
Again, I have not done it but that's the rumor with the old bodies.
Has anybody tried taping the pins on 2x on the new bodies?? ;-)
SS

SS,

I have tried taping the pins on a 1.4 X and the 2X. You're right it does not work on the 2X. I will warn you though, even though it will autofocus with the 1.4 X taped pins, the autofocus works slowly.

That was with the old bodies, 7D, and the old lens. I guess it's possible things have changed but I doubt it.

If you want to know for sure I'd suggest buying it, 2X, from a reputable dealer that you can return it to if it doesn't work out for you.

So much is changed with the new cameras I guess anything is possible.

Jim D

singleviking Loc: Lake Sebu Eco Park, Philippines

oldtool2 wrote:

SS, br br I have tried taping the pins on a 1.4 X... (show quote)

I'm sure that if you call B&H or Adorama, they will give you the answer. They don't want to sell you something that won't work and then get it returned, and they have enough customer base that probably every combination has been tried by someone and feedback given to them.
However, I think the f-8 limit is the lowest light any camera can handle for autofocus using any multiplier.

oldtool2 Loc: South Jersey

singleviking wrote:

I'm sure that if you call B&H or Adorama, they will give you the answer. They don't want to sell you something that won't work and then get it returned, and they have enough customer base that probably every combination has been tried by someone and feedback given to them.
However, I think the f-8 limit is the lowest light any camera can handle for autofocus using any multiplier.

You might get an answer but I wouldn't bet on it. Some of the newer cameras with their cross points can do better than f8 but I am not sure which ones. The canon 2X TC can be a finicky TC, since they make three different versions. They are a proprietary TC, as is Sigma TC's, by that I mean they are designed to work on only certain lenses. I still think the best bet is to just try it.

Another suggestion I would make is to try the Tamron TC's, I have found they work quite well where other TC's won't.

Jim D

Swamp Gator Loc: Coastal South Carolina

You can successfully use AF with this lens and Canon's 1.4 III on several of their higher end bodies including the 7D MK II if using Center Point AF only.

No go on the 2X though.

Peterff Loc: O'er The Hills and Far Away, in Themyscira.

Swamp Gator wrote:

You can successfully use AF with this lens and Canon's 1.4 III on several of their higher end bodies including the 7D MK II if using Center Point AF only.

No go on the 2X though.

That list is in the lens manual I posted earlier for anyone that wants to check....

gregoryd45 Loc: Fakahatchee Strand

ronjay wrote:

Will this combo autofocus

Please look at Morrisdh, on UHH, he has posted some shots with the new 7D MkII and new 100-400 and the 1.4X III he loved it and auto focus was fast

oldtool2 Loc: South Jersey

Swamp Gator wrote:

You can successfully use AF with this lens and Canon's 1.4 III on several of their higher end bodies including the 7D MK II if using Center Point AF only.

No go on the 2X though.

I would be interested to know if the Tamron 2X TC would work. I have had good luck using the Tamron TC's on lenses that the Canon and Sigma TC's wouldn't work on.

Jim D