05-02-2013 01:55 PM
I shot two gigs last night in very low light with the upgraded 5D3 and I am extremely happy. The new speed to locl AF makes it feel like a different camera -- probably up to half the time to lock than before I upgraded. I can't vouch for any of the other aspects of the firmware upgrade, but the AF lock speed with IR focus assist is WAY better now.
Canon: Please get the fix out for this on the 1DX ASAP! It doesn't seem reasonable to me that your flagship camera is lagging behind lower-end cameras for performance updates.
05-05-2013 10:30 AM - edited 05-05-2013 10:34 AM
Posts the 2 wedding photogs. I trust these people.
This is me reporting back after the wedding.
Yeah...pretty big difference.
I never really complained about slow AF with the assist beam. I always felt it was deliberate, but nothing close to being a show stopper.
That said, even I noticed the improvement. Extremely responsive at the reception I was shooting tonight.
seemed to be much faster to me as well. Very responsive. Like it a lot.
05-30-2013 10:36 AM
We have another important update on this topic. A firmware update for the EOS-1D X has just been released. Firmware Update Ver. 1.2.4 incorporates functional improvements including AF speed improvement when using a Canon Speedlite’s AF-assist beam.
To learn more and download the update, click here.
05-30-2013 11:11 AM
I actually sold my original mark 3 because of the AF problem...just got another one and uploaded the firmware...what a difference! I think the camera is just about perfect now. The next crusade issue.....the 630 RT's....a great advance and design for profession flash.....but the recycling has let me down....I will be starting a new thread on this today.
05-30-2013 06:47 PM
And no 2nd curtain flash on the new radio transmitter as I understand it. What's the deal with that?
06-18-2013 11:53 AM - edited 06-18-2013 11:54 AM
i can categorically confirm this firmware hasnt fixed the issue for me....
its is particularly bad on my 5D3 with 70-200mm F2.8 IS USM II
Am an experienced wedding photographer... and this camera is driving me insane.. low light focus and usability is just non existent.
had a wedding on the weekend... and i cannot notice any difference pre and post firmware upgrade at all!
i cannot get this thing to lock focus... it just hunts and hunts.... and it happens on both my 5D3 bodies with a prime sitting on one and a zoom on the other... with 580 EX II sitting on both.
sorry not happy with the firm ware fix at all
06-18-2013 02:19 PM
There are two issues of interest, at least to me :-) . the issue addressed specifically by this thread is the use of the AF assist beam from a speedlite. my testing shows, on my own 5D3, that this works very well. at essentially "pitch black" conditions, my 5D3 works beautifully with AF assist, where the 580EX ii paints a nice pattern of light on the subject,enabling the camera to lock focus instantly. within reasonable distances of course;
the other issue at work is the AF performance itself in low light, without AF assist from a speedlite. Canon specifies that the AF system is sensitive to EV -2, using the center AF point, f/2.8 and I assume a high contrast subject.
I performed an approximate test of this as well, by creating a lighting condition requring .5sec at f/2.8 and iso 6400 to obtain a good exposure (thats EV -2 if my calculations are correct.), and my 5D3 captured focus just fine (I even acheived focus at EV -3 but it wasn't dependable). it takes a while (sometimes a few seconds) but this is, in my opinion, reflective of the accuracy and retry-credence algorithms present in the camera. I have no problem taking that long to focus in that level of light because I'm usually not in a cave :-). At that level of light, you can hardly see the subject anyway, much less a moving one :-). keep in mind that the EV -2 sensitivity requires the center point.
in some ways, my tests were crude, i.e. I depended on the cameras own meter to roughly approximate EV -2. In other ways, my tests were severe, in that I was using a 100mm macro f/2.8 handheld. I thought it was impressive to see the AF system lock onto what it surely sees as a moving target with very little light. FYI I was using the default as-shipped focus mode.
I repeated the above tests with my 70-200 f/2.8 IS II, obtaining similar results. At approximately 15 feet subject distance and approximately EV +3, the AF assist even enabled focus on a very low contrast, dark subject (a treadmill belt, lol).
06-18-2013 03:13 PM
I can absolutely confirm a vast improvement in AF lock after the firmware upgrade, but it's specifically when using the IR assist.
I've never had any issues with my 5D3 and 70-200 combo with either the old or new version of that lens and I shoot lots of low-light events including weddings. In very low light the center point is sometimes the only one that will lock, though. It's not going to lock in near darkness, but I don't have any complaints at all with that combo and I use it a lot.
If you're getting performance as bad as you say in a reasonably low light, you probably have another problem.
06-18-2013 08:23 PM
i can assure you that i dont have another problem... when i have two seperate 5D3 and 2 580EX II ... with two different lens.. on it... a 24-70 and a 70-200mm ..and they are both patched to the latest firmware and all using centre point focus.. and im still getting that issue ?????