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17-40, 16-35 2.8II or 16-35 IS 4 on 1d IV

Started Apr 12, 2016 | Discussions thread
OP powerear New Member • Posts: 3
Re: 17-40, 16-35 2.8II or 16-35 IS 4 on 1d IV
1

Thanks for your replies. Today I am going to visit calumet to take some test shots.

I testest a bit with my existing 17-40 f4 and I find the corners with the crop of 1.3 not very sharp on f4. On FullFrame this will be even worse.

On my old 1d II this was not the big issue, but on the 16 MP Mark IV and bigger prints this might be a problem.

But another question regarding the 1D IV focus system:

The cam uses a higher number of cross sensors mit 2.8 and also with some of the f4 lenses. Including 17-40f4.

As the 16-35 f4IS is relatively new on the market this lens is not on the list of supported lenses. Does the cam support this lens with 39? cross type sensors as well?

How to test this?

Thanks

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