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Archive 2009 · Canon EOS 7D Master thread

  
 
Gil_W
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p.112 #1 · Canon EOS 7D Master thread


The sun is out today first time sine I got the 7D (a week). AI Focus and AI Servo dead on track with excellent results. I'm very impressed. I guess I jumped to conclusions about the AF too quickly.

Probably as a few said, I was expecting too much from the cam in low light conditions in the woods. It is really an excellent camera.



Oct 07, 2009 at 11:49 AM
JazzyMac
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p.112 #2 · Canon EOS 7D Master thread


Yohan Pamudji wrote:
Thanks for the MF report, brainiac. Here's hoping the 5DII replacement (or 3D?) and up will still offer optional high precision focusing screens, because the 7D is out of the frame for the alt crowd and those who often need to manual focus large aperture lenses in conditions where AF doesn't cut it.

I would wait for confirmation on this. I'm fairly new to this forum, but one person's opinion doesn't mean it's fact. Or does it?



Oct 07, 2009 at 11:58 AM
WillWeb
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p.112 #3 · Canon EOS 7D Master thread


I suspect that the in-viewfinder LCD had to go under the focus screen to keep it as close as possible to the same plane as the bottom surface of the screen (where the image is projected). That would be why the 7D doesn't have interchangeable screens. If I'm correct, the 1D4 will probably have to sacrifice either the LCD in the viewfinder or the interchangeable screens. Canon could go with a fixed screen better suited for MF, but at the sacrifice of brightness. I don't think they'll do that on bodies where speed is the critical factor and many users are shooting superteles that start at f/4 or 5.6 (1DX / 7D), but I can see it on the landscape/portrait bodies (5DX / 1DsX). The real breakthrough would be if they could find a way to return to the full-silvered mirrors of the golden age before AF.


Oct 07, 2009 at 11:59 AM
Yohan Pamudji
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p.112 #4 · Canon EOS 7D Master thread


JazzyMac wrote:
I would wait for confirmation on this. I'm fairly new to this forum, but one person's opinion doesn't mean it's fact. Or does it?


No, 1 person definitely doesn't make it fact But I've read other reports on this that say the same thing, and it jives with common sense (no Canon standard focusing screen is good for MF of large aperture lenses), so I tend to believe it. I'd be happy to find out otherwise, but what I've seen so far points to this being true.



Oct 07, 2009 at 01:04 PM
Greg Schneider
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p.112 #5 · Canon EOS 7D Master thread


Does Nikon offer replacement focusing screens? They use similar VF tech as the 7D.

Edited on Oct 07, 2009 at 06:55 PM · View previous versions



Oct 07, 2009 at 01:07 PM
Greg Schneider
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p.112 #6 · Canon EOS 7D Master thread


I haven't kept up with this enormous thread, but does anyone know if the 7D's intermediate ISO levels are "real" and "linear"? I guess that would mean software implementation vs hardware, since for instance the 5D2 is better at ISO320, 640 etc than 400, 800...anything tests on that out there for the 7D?


Oct 07, 2009 at 01:08 PM
JazzyMac
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p.112 #7 · Canon EOS 7D Master thread


Yohan Pamudji wrote:
No, 1 person definitely doesn't make it fact But I've read other reports on this that say the same thing, and it jives with common sense (no Canon standard focusing screen is good for MF of large aperture lenses), so I tend to believe it. I'd be happy to find out otherwise, but what I've seen so far points to this being true.

I'd like to learn more about this. Can you please post links of where you have read it?



Oct 07, 2009 at 01:10 PM
kirry007
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p.112 #8 · Canon EOS 7D Master thread


Greg Schneider wrote:
I haven't kept up with this enormous thread, but does anyone know if the 7D's intermediate ISO levels are "real" and "linear"? I guess that would mean software implementation vs hardware, since for instance the 5D2 is better at ISO320, 640 etc than 400, 800...anything tests on that out there for the 7D?


(kind of ) covered here: https://www.fredmiranda.com/forum/topic/819624



Oct 07, 2009 at 01:12 PM
Yohan Pamudji
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p.112 #9 · Canon EOS 7D Master thread


JazzyMac wrote:
I'd like to learn more about this. Can you please post links of where you have read it?


The only place I can remember (and find) where I've read it is also in this thread:
https://www.fredmiranda.com/forum/topic/809801/74#7588518

I know I've read a report on another forum, but can't remember where. Sorry, wish I could be of more help. It seems believable enough to me though. A standard focusing screen that both retains brightness and shows accurate DOF for large apertures would be a major selling point, and if Canon managed to do so I think we'd have heard about it by now. This is why Canon have offered optional high precision screens for all non-Rebel cameras since the 5D and 1D Mark IIN (except for the 30D, which Canon then started offering one for the 40D and 50D).



Oct 07, 2009 at 01:36 PM
skibum5
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p.112 #10 · Canon EOS 7D Master thread


brainiac wrote:
Probably, but don't take my word for it. If you are f2.8 manual focusser, test the camera with an f2.8 lens and look at your results before deciding if you think it's accurate enough.

That said, I'm not even sure the screen was anywhere near calibrated in the 7D I tried. It seemed way off, and I did shoot some shots with an alt lens at f2.8, without great success.


it seems more like an f/5.6 screen to me, even with an f/4 70-200 the DOF looks way larger than it really is, almost anything looks like it is in focus so it's really kind of disturbing at times, sometimes it feels like the AF isn't even doing anything since you can't always see any difference.






Oct 07, 2009 at 01:48 PM
garyvot
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p.112 #11 · Canon EOS 7D Master thread


I agree, based on my limted experience with the camera so far. I love the viewfinder size, brightness, etc., but it does not seem to be tuned for easy manual focusing. I think if you are into fast primes, alt-lenses and the like, you'll still want a 1-series or 5-series with an 'S' screen.

I sure hope Canon doesn't just drop this new viewfinder tech into the 3D or 1Ds Mark IV without giving us options for manual focusing.

They wouldn't do that, would they?



Oct 07, 2009 at 02:01 PM
alundeb
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p.112 #12 · Canon EOS 7D Master thread


Greg Schneider wrote:
I haven't kept up with this enormous thread, but does anyone know if the 7D's intermediate ISO levels are "real" and "linear"? I guess that would mean software implementation vs hardware, since for instance the 5D2 is better at ISO320, 640 etc than 400, 800...anything tests on that out there for the 7D?


The intermediate ISO's are still software implemented.
125 is 100 underexposed and pushed 1/3, and gives more read noise than 100.
160 is 200 overexposed and pulled 1/3, and gives less read noise and less headroom than both ISO 100 and 200.
It actually turns out that you get the widest Dynamic Range at ISO 160, but the loss of headroom must not be forgotten.



Oct 07, 2009 at 02:11 PM
RobDickinson
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p.112 #13 · Canon EOS 7D Master thread


Nikon have LCD in the viewfinder and you can change the focus screen.

Some they dont support but you can do it to all of them, my mate has to his D300.



Oct 07, 2009 at 02:20 PM
UCSB
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p.112 #14 · Canon EOS 7D Master thread


I have to agree with above comments ... manual focus with the viewfinder and wide aperture lenses isn't working very good for me. Not a big deal ... it is just nice to know I don't want to rely on it. So manual focus is now best approached in liveview. That is a better approach if you want precision anyway (light permitting).


Oct 07, 2009 at 03:01 PM
cameron12x
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p.112 #15 · Canon EOS 7D Master thread


UCSB wrote:
I have to agree with above comments ... manual focus with the viewfinder and wide aperture lenses isn't working very good for me. Not a big deal ... it is just nice to know I don't want to rely on it. So manual focus is now best approached in liveview. That is a better approach if you want precision anyway (light permitting).


If it hasn't already been vetted in detail yet, this topic seems deserving a thread of its own?

"Live View vs. Focusing Screens".

Who is going to start it?



Oct 07, 2009 at 03:13 PM
Yakim Peled
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p.112 #16 · Canon EOS 7D Master thread


UCSB wrote:
I test and AF MA all of my lenses and keep results in a database with comments (plus all test images). On my 7D, I am getting the highest percentage of accurate focus I have ever seen on any Canon body I have ever owned with those two lenses. My data is on another computer, but the results were in in the 96% - 100% range. My comments for the 17-55 in a table I keep summarizing my results was "astonishing". So .. I don't think that the problem is the lenses or the 7D's ability to focus them.

It
...Show more

10X. That's very reassuring.

Happy shooting,
Yakim.






Oct 07, 2009 at 04:15 PM
Yakim Peled
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p.112 #17 · Canon EOS 7D Master thread


brainiac wrote:
I tried out a 7D yesterday and it looks great in all of the documented ways. Great high iso for a crop camera, nicer to hold and grip than a 5D2, and all the features looked great. I held up the viewfinder next to my 5D2's, and found that there is only a very slightly larger view in the 5D2 finder. It seems truer, but since the 7D can't even take a manual focus screen, I don't think anybody's going to notice that. That's 99% of the camera dealt with, now for the gripes:

- the focus screen certainly doesn't allow
...Show more

I don't shoot video because it does not interest me. Does that makes me a FM stills elite? And BTW, CR states the 1D4 announcement date is at the end of January. Care to elaborate?

Happy shooting,
Yakim.






Oct 07, 2009 at 04:17 PM
n0b0
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p.112 #18 · Canon EOS 7D Master thread


brainiac wrote:
- another deal breaker for me is this: you can't shoot video with flash, ...


Sorry but how do you shoot video with flash? o_0



Oct 07, 2009 at 04:43 PM
thw2
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p.112 #19 · Canon EOS 7D Master thread


Greg Schneider wrote:
Do Nikon offer replacement focusing screens? They use similar VF tech as the 7D.

I haven't kept up with this enormous thread, but does anyone know if the 7D's intermediate ISO levels are "real" and "linear"? I guess that would mean software implementation vs hardware, since for instance the 5D2 is better at ISO320, 640 etc than 400, 800...anything tests on that out there for the 7D?


Hey, you are asking the exact same questions I have in mind!

If the Nikon D3/D3X/D700/D300s use the same VF tech as the 7D, Canon may very well follow suit with their 1D/1Ds upgrades.



Oct 07, 2009 at 05:48 PM
myy001
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p.112 #20 · Canon EOS 7D Master thread


My first try of DIF with 7D:
http://bjgphg.blu.livefilestore.com/y1po0KgJP2pp56rZd2UN-eQ5v1g0YVh3xZWUu14LqiNqZlqD6f8dmO8T-HtfgcSPtzZsDaQt69gFrF-K3hEJib5JtTStPKCDVHp/DIF.jpg



Oct 07, 2009 at 05:57 PM
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