OFFICIAL: Canon 5D Mark III Announced

jacobsen1 wrote in post #14112271
ok, reading the manual (page 98-99) it's 61 for all, then just the crosses (no number given), then 15 and then 9. Are the 15 and 9 options all cross type? It's hard to tell from the size of their diagram in the manual. The 15 point option has a great spread, so I'm hoping it's all crosses, but if not I hope the 9 is at least.

Let me know once you find out. This is all very interesting as I am sure I'll be using the crosses only.

shimmishim wrote in post #14113860
But when will that be?!

Probably when they got a camera to test You just need to be patient. Or you could offer one of the members that got it to buy a card for them if they are willing to test it for you.

jacobsen1 wrote in post #14112271
ok, reading the manual (page 98-99) it's 61 for all, then just the crosses (no number given), then 15 and then 9. Are the 15 and 9 options all cross type? It's hard to tell from the size of their diagram in the manual. The 15 point option has a great spread, so I'm hoping it's all crosses, but if not I hope the 9 is at least.

I know I've seen a bigger diagram somewhere of the 15 and 9 point options, but of course now I can't find it. IIRC, the 9-point is all cross-type, because I remember being excited about that one and deciding I'd use it if I ever got the camera. The corner points are pretty much exactly at the rule of thirds intersections, and being cross-type makes them perfect for me. That could mean that the 15-point one isn't all cross-type, but I can't say for sure.

GMCPhotographics wrote in post #14111618
I've suspected for some time that the 24-70L isn't a true f2.8 lens at the wide end. I've noticed that it meters slightly slower at 24mm and 35mm than my 16-35IIL when on a tripod. It meters differently at 70mm to 24mm too, which is often unnoticed due to the focal lenght shift. I think there's a difference between a theoretical f2.8 and a real f2.8 (if that follows). The film industry doesn't trust f stops, they use T stops, which measure a tested light trasnmission though the lens. Most T stop measurements are slightly slower than their f stop counterparts.

Interesting theory. Certainly would explain the 24-70L only being able to use 1 dual cross-type while the older 28-70L can use all 5. In my personal use I don't think it would matter since I would pick a subset of the selectable AF points to use--probably just 9--and I think only 1 of the dual cross-types would be available to me to select in that setting anyway, although I could be wrong.

GMCPhotographics could you plot out the spread of the 15 point and 9 point options of the 5dmkIII on the charts below? This would help us understand the spread. Thanks!


From DP Review:

F2.8 or brighter

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HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO

Little disappointing that all af points are pretty much in center

vipergts831 wrote in post #14114041
From DP Review

If you're replying to me and ben, that's not quite what we were talking about. When you go into 15-point or 9-point selection modes, which of the points are selectable? Those are the diagrams we're wondering about.

nekrosoft13 wrote in post #14114043
Little disappointing that all af points are pretty much in center

The outer points are at or slightly beyond the rule of thirds intersections. Realistically how often does one need to focus on something further out than that?

Yohan Pamudji wrote in post #14114059
If you're replying to me and ben, that's not quite what we were talking about. When you go into 15-point or 9-point selection modes, which of the points are selectable? Those are the diagrams we're wondering about.

Someone has the camera in here. It should be very easy to line up the illuminated points to the charts i posted. Choose either 15 point or 9 point and look at these charts and plot them out. Then from the charts themselves you will know the spread of each type.

Does some one have a link or can explain what the difference of horizontle vs cross type vs double cross point means?

Fricks wrote in post #14114083
Does some one have a link or can explain what the difference of horizontle vs cross type vs double cross point means?

Enjoy:
http://learn.usa.canon​.com …n_crosstype_art​icle.shtml

nekrosoft13 wrote in post #14114043
Little disappointing that all af points are pretty much in center

you think that's disappointing? look at Nikons. Only the center 20% are cross types.

ilumo wrote in post #14114099
I think that canon has really done a good job with expanding the AF points this time around. I can't wait to shoot without having to focus-recompose.

You speak the truth, my friend. That alone will be worth the price of the upgrade for me. When the price gets down below $3K anyway

Yohan Pamudji wrote in post #14113986
I know I've seen a bigger diagram somewhere of the 15 and 9 point options, but of course now I can't find it. IIRC, the 9-point is all cross-type, because I remember being excited about that one and deciding I'd use it if I ever got the camera. The corner points are pretty much exactly at the rule of thirds intersections, and being cross-type makes them perfect for me. That could mean that the 15-point one isn't all cross-type, but I can't say for sure.

skip to ~50s in this:
http://www.youtube.com​/watch?v=LrnUS2qTcVo
and it looks like the 9 points fall under the 45, but with the 15, the outer row may or may not be, but the next set in, the middle rows look like they're not. It'll be interesting to see how this works with the helper points too because with my old D700, with helper points turned on you could use non cross type points in terrible light provided the helper points were cross type and turned on, which was the case for me. I'm just excited to play with it and learn these little tricks.

jacobsen1 wrote in post #14114139
skip to ~50s in this:
http://www.youtube.com​/watch?v=LrnUS2qTcVo
and it looks like the 9 points fall under the 45, but with the 15, the outer row may or may not be, but the next set in, the middle rows look like they're not. It'll be interesting to see how this works with the helper points too because with my old D700, with helper points turned on you could use non cross type points in terrible light provided the helper points were cross type and turned on, which was the case for me. I'm just excited to play with it and learn these little tricks.

That's probably what I saw--a screen grab of the selectable AF point config screen. I came to the same conclusion you did: 9 points are all cross-type, but for 15 points the 2nd and 4th columns are non-cross. At least if the tiny diagrams are to be believed.