Beautiful Hummer, Jaime. I would also be interested in details on the shot.
I see that you're now shooting with a 1DX - I would be very interested in your experience so far with it, in terms of comparison with your prior Mark IV, working with the images in post-processing, etc.
One big disadvantage for me, and many bird shooters, is the loss of Autofocus capability when the maximum aperture is f/8. Is that still the case, or did they manage to work around that?
Also, there is an apparently effective loss of pixels because the sensor size increase is not matched by the pixel count increase, resulting in a lower pixel density (again, relative to the Mark IV). For people whose work is more at the long end, than the short end, this could potentially be a downside.
Your thoughts on these and other initial impressions would be welcome.
One big disadvantage for me, and many bird shooters, is the loss of Autofocus capability when the maximum aperture is f/8. Is that still the case, or did they manage to work around that?
Don,
I just went up and had a look at the autofocus capability of the 1Dx with my 500mm -
It worked fine at f8 all the way up to f22 - if there was an issue, it must be worked out.
It works great with everything I tried!
J
Jaime,
While that's encouraging, it might be an incorrect setup to answer Don's question about the f8 limitation for the 1DX. As far as I understand the matter, the critical f stop is the optical one at the widest aperture. For your 500mm, it's f 4.0, I believe. Try that with a 2x teleconverter and that should answer the question.
Asher
Precisely. Autofocus always operates when the aperture is wide open, and only stops down when the image is taken. The 1 Series cameras have historically been the only Canon camera bodies that maintained Autofocus when the maximum aperture was only f/8. All the others required f/5.6.
So putting Canon's 2x teleconverter on any f/4 lens will test this out - it is my understanding that the 1DX is the first 1 series body that will not Autofocus with this setup.
Ironically, I believe if you use a non-Canon teleconverter, Autofocus might still operate with a maximum aperture of f/8, as apparently these converters don't correctly report the aperture status to the camera, so the camera doesn't "know" it's now at f/8.
Sorry, been traveling to a shoot for a few days -
I tried the 1.4x and all f stops work / but, when I tried the 2x it did not auto focus. Not a problem for me (never use it), but if someone is counting on it working with the 1Dx - they will be disappointed!
Don and Jaime,
Switch to live view. You will get autofocus by contrast detection. It should be as good as manual focus. You would need to take twice the number of shots to account for the wider error in that mode. So if you normally made 5 shots and got one perfect picture, you might need about 7-10.
Asher
Thanks for the verification, Jaime. Disappointing, but not surprising.
As you indicate, for many people it's a non-issue, but for bird photographers it's actually a pretty big one. I'm astonished that Canon made this move. The least they could have done is to let the photographer enable it as an option, as they do for the "expanded" ISO settings.
Hi Don,
From what I've read, that is technically not possible, because of the design choices made to improve the AF accuracy.
Apparently Canon has tried to move the left and right, and top and bottom, AF sensors further apart. That increases the measuring base for the phase detection, but unfortunately it also cuts the light for the sensors off at narrower apertures sooner (below f/8.0). They could perhaps have added more AF sensors closer together, but that gets complicated very quickly because there is also a kind of facet lens involved.
Unless one uses an extender without proper signal transfer, it looks like an effective widest aperture of f/8.0 will continue to disable AF in the 1Dx. Maybe Canon will decide to add a 1.6x extender to their program, which would possibly work with f/4.0 lenses.
Cheers,
Bart