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Messages - Stephen Melvin

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196
EOS Bodies / Re: Some unanswered Mk III questions
« on: March 19, 2012, 09:22:50 PM »

Another unanswered question:
What is the live view output resolution of 5d mkIII?

Assuming you mean video, its 720p.  Lots of complaints that it does not output full resolution.

As noted earlier, it's 1080i.

197
EOS Bodies / Re: Some unanswered Mk III questions
« on: March 19, 2012, 07:15:58 PM »
We're getting a bit off track here. Any concrete answers to my questions? So far, the only concrete answer is about taking stills during video recording, and it's a disappointing one, from a "things should be improved" point of view.

198
EOS Bodies / Re: 5D mk III: ISO 25600...Stunning!!!!!
« on: March 19, 2012, 05:38:20 PM »
I'm looking forward to using the 24 f/1.4L II on this. I live for the dark...

199
EOS Bodies / Re: Some unanswered Mk III questions
« on: March 19, 2012, 04:00:42 PM »
I guess we'll tack that one up to, "probably still broken."

What about my other questions?

1. The 5D Mk III inherits the 7D's iFCL metering sensor. Does it also inherit the low light flaw of the 7D, where the burst mode slows way way down in a dark environment?

-- probably still broken, but no real world confirmation.

2. Has shooting in Live View mode been made any more responsive? Current implementations are like first generation compact digital cameras from over a decade ago. I call it, "click and wait."

3. Has CDAF improved in Live View mode? I find I have to use "quick" AF, which drops down the mirror and engages the phase detect AF module, because CDAF is so slow as to be absolutely useless most of the time. Virtually all of the competition has been ahead of Canon on this. I hope to see a very significant improvement in the Mk III.

4. Any improvements to the ability to take a still in the middle of a video clip? A faster main processor should allow for a shorter gap in the clip.

 -- according to the manual, still takes a full second.

5. How is the new camera removing moiré? Is there on-sensor binning? If it's binning, then why is the maximum ISO lower for video than for stills? In theory, it should be higher with binned pixels. Is it still line skipping? I haven't seen a word about this.

6. What's the buffer when shooting RAW and sending the files to both cards?

200
EOS Bodies / Re: Some unanswered Mk III questions
« on: March 19, 2012, 03:11:27 PM »

Well, metering, at the very least, will always occur. Even in M mode, it is essential so the camera can handle nuanced changes in lighting and still expose according to the settings you choose. You can move AF start to a different button, and only activate AF when you want to...that might help improve burst rate to some degree.

"...it is essential so the camera can handle nuanced changes in lighting and still expose according to the settings you choose."

Let's say my settings are ISO 3200, 1/125 at f/1.4. Those remain absolutely consistent, because I've set my exposure and don't need the meter anymore. No matter what the meter reads, my settings are ISO 3200, 1/125 at f/1.4. I'm in manual mode. The meter should have absolutely no bearing on the speed of operation of the camera. That it does is absurd.

201
EOS Bodies / Re: Some unanswered Mk III questions
« on: March 19, 2012, 01:21:17 PM »
Another unanswered question:
What is the live view output resolution of 5d mkIII?

1080i with an external monitor.

202
EOS Bodies / Re: Some unanswered Mk III questions
« on: March 19, 2012, 01:20:34 PM »

1. The 5D Mk III inherits the 7D's iFCL metering sensor. Does it also inherit the low light flaw of the 7D, where the burst mode slows way way down in a dark environment?

I'm not sure thats just a 7D flaw. AF and Metering sensors have to work with very little light due to the way they work. They start out with half as much light as passed through the lens, since a half-silvered mirror splits that light so some of it passes to the metering sensor and through the viewfinder, and some of it is directed to the AF unit. The AF unit itself splits that remaining light multiple times...for each AF point. Each AF point requires its portion of light to be split again and projected onto two phase-sensing strips.

So the metering sensor is always working with half light, and the AF points are always working with a fraction of half the light. In a dark environment, both need more time to gather enough to do their job. The AF unit is likely to put more of a drag on frame rate than the metering sensor. In the case of the 1D X and 5D III, they do have that 5-point vertical strip of extra sensitive double cross-type points...one standard sensitivity and one diagonal double sensitivity. That should certainly help with AF speed in low light, however they are limited to f/2.8 lenses. If you are using a lens with a narrower maximum aperture, you won't gain the benefit of those extra sensitive points, and  you'll still likely experience a drag on frame rate in low light.

You don't understand the nature of the 7D's flaw. I'm not referring to AF or metering, really. If you take a 7D and put it on "M" and the fastest drive mode. Set the lens to manual focus and set your shutter speed an aperture manually.

In other words, take the AF and metering completely out of the equation.

Point the camera in a bright environment and you'll get the full 7fps drive speed.

Point it in a dark environment and it slows way, way down, and there is absolutely no reason for it. None. Nada. Zip.

This is what is known as a bug, and I'd like to know if the Mk III does this, too.

203
Lenses / Re: advice on lens for evening events
« on: March 19, 2012, 09:41:23 AM »

it is very very slow its well worth testing the sigma f1.4 side by side and you can see a massive speed difference

Of course, being a Sigma, it may never focus at all.

204
EOS Bodies / Some unanswered Mk III questions
« on: March 19, 2012, 09:38:21 AM »
Actually, it seems like these haven't been asked. Anybody own a Mk III, yet?

As someone who's owned a 7D and a 5D Mk II, there are some areas that really need improvement that haven't been mentioned in any of the marketing or brief "previews" from various sites.

1. The 5D Mk III inherits the 7D's iFCL metering sensor. Does it also inherit the low light flaw of the 7D, where the burst mode slows way way down in a dark environment?

2. Has shooting in Live View mode been made any more responsive? Current implementations are like first generation compact digital cameras from over a decade ago. I call it, "click and wait."

3. Has CDAF improved in Live View mode? I find I have to use "quick" AF, which drops down the mirror and engages the phase detect AF module, because CDAF is so slow as to be absolutely useless most of the time. Virtually all of the competition has been ahead of Canon on this. I hope to see a very significant improvement in the Mk III.

4. Any improvements to the ability to take a still in the middle of a video clip? A faster main processor should allow for a shorter gap in the clip.

5. How is the new camera removing moiré? Is there on-sensor binning? If it's binning, then why is the maximum ISO lower for video than for stills? In theory, it should be higher with binned pixels. Is it still line skipping? I haven't seen a word about this.

6. What's the buffer when shooting RAW and sending the files to both cards?

205
FYI, the vaunted D800 "clean HDMI output" has been confirmed to be only 1080i, which a strong argment can be made is actually weaker than 720p. So nix that heavily touted "advantage."

Oh wow, straight from the owner's manual, too. Page 257. And from what I've read, it disables internal audio recording altogether, so you'll need a completely separate device to record audio.

http://www.eoshd.com/content/7489/first-test-of-nikon-d800-hdmi-output

Looks like one of the D800's advantages may not be an advantage after all, since the Mk III also has 1080i output from the HDMI port.

206
I saw a video where they confirmed that it outputs 1080i when recording, by connecting and external Zacuto monitor. It displayed "1080i" on the screen. I don't know if that's quite what people are looking for, but it's certainly an improvement over the 480p of the Mk II.

Realistically, this is an issue for a very small percentage of shooters. How many people have that kind of recorder? And who wants to deal with carrying it? I think those who do are quite possibly in the range of possible C300 customers.

We'll find out more about the quality of the new camera's video soon enough.

207
EOS Bodies / Re: 5DIII Fastest SD Card
« on: March 18, 2012, 10:40:29 PM »
The 5DIII supports CF UDMA 7 cards.  To my knowledge, only SanDisk and Lexar offer them.  If you want maximum performance, that is the card you should look for...

I like SanDisk cards myself...  I had a Lexar Professional card corrupt right in the middle of a shoot and completely lock up my camera...  I have been leery of them ever since...

The way I understand UHS-1 cards; if your camera does not support them, you do not get the 90MB/s they are capable of...  I believe/am pretty sure they default down to Class 10 speeds; which is 45MB/s for SanDisk...

So, to answer your question based completely on the inference of the interview, a Class 10 SDXC or SDHC...

Yeah, I had a full 32 GB Lexar card fail completely. Can't format it or access it at all. It was about eight weeks old. Sent a complaint to Lexar and never heard back from them. I'm done with this company.

208
EOS Bodies / Re: 5D Mark III VS 5D Mark II Video Comparison *Video*
« on: March 17, 2012, 10:39:21 PM »
Note that the side-by-side comparison with the ground has the cameras focused very differently. The Mk II is backfocused, so the ground appears sharper than the Mk III, which is focused on the model.

209
Lenses / Re: New prime lenses for wedding/events
« on: March 17, 2012, 11:56:38 AM »
My own wedding kit is in two parts:

Core zooms:
17-40 f/4L
24-105 f/4L
70-200 f/2.8L IS USM II

And fast primes:
24 f/1.4L II
50 f/1.4
85 f/1.8

When I'm shooting fixed lenses in dark reception halls, I'd say I use the 24 60% of the time, the 50 about 30% of the time, and the 85 the rest. The 24 is a killer low light lens, and it focuses perfectly even with my original 5D.

210
EOS Bodies / Re: 1D X - f/8 Issue Activated?
« on: March 17, 2012, 01:45:56 AM »
It is a physical limitation. AF sensors are all about angles, and the exit pupil for an f/8 lens will be invisible to AF sensors that are aimed at the f/5.6 or larger exit pupil. I don't think firmware will change this, unless they update it to ignore the aperture and tell people that it may or may not work. That's what happens with the pin-taping that people do. Sometimes a bit of light bleeds around enough for the sensor to grab onto -- though I wouldn't call it reliable.

Interesting explanation.  How was it that older bodies could autofocus at f/8 with the center point sensor?

Because they had a sensor designed to operate at f/8. The new sensor is not designed to operate at f/8.

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