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Thread started 01 Oct 2009 (Thursday) 02:45
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My 7D iso test (including vs. 40D) 56K no.

 
mrkgoo
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Oct 01, 2009 02:45 |  #1

So while I didn't preorder, I did go to a camera store today, and lo and behold, they had a 7D. Impulse buy!

Anyway, for those that are interested (probably everyone), my semi-scientific iso test.

These are images viewed at 100% in iPhoto, and then screen grabbed. These are resized screen grabs, but click through to my flickr to see the 100% screen grab (the images are 1.8 MB each, so I'm not posting them here).

Conditions:

Hand held, Manual exposure, EF-S 17-55, f/2.8, AWB, Jpeg:

Again, RESIZED IMAGES -> CLICK TO 100%! Because these are resized by flickR, this can sharpen and intensify the noise.

7D High iso ( Noise reduction disabled):
Top: iso400,800,1600
Bottom: iso3200, 6400, 12800

IMAGE: http://farm3.static.flickr.com/2509/3970579487_828c2a030d_b.jpg
IMAGE LINK: http://www.flickr.com …0@N07/397057948​7/sizes/o/  (external link)

---------------

7D noise reduction (in camera, iso1600):
Top: NR disabled, low NR
Bottom: standard NR, strong NR

IMAGE: http://farm3.static.flickr.com/2426/3971346964_43a6d933bb_b.jpg
IMAGE LINK: http://www.flickr.com …0@N07/397134696​4/sizes/o/  (external link)

---------------

7D vs 40D high iso (NR disabled):
Top: 40D, iso 400, 800, 1600, 3200(H)
Bottom: 7D, iso 400, 800, 1600, 3200

IMAGE: http://farm4.static.flickr.com/3501/3971345328_ac5b1aea28_b.jpg
IMAGE LINK: http://www.flickr.com …0@N07/397134532​8/sizes/o/  (external link)
---------------



  
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KenjiS
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Oct 01, 2009 03:04 |  #2

7D is substantially cleaner here...

However to warn you, You're going to get people complaining the 40D shot is lit different and its darker... ;)


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mrkgoo
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Oct 01, 2009 03:10 |  #3

KenjiS wrote in post #8739334 (external link)
7D is substantially cleaner here...

However to warn you, You're going to get people complaining the 40D shot is lit different and its darker... ;)

Yeah, I know. Still, these were all settings on manual, so the exposure settings were actually the same. I was probably hovering at different distances between the shots too. Also looks like I missed focus on the 'H' a few times. So take from that what you will - don't blame me if you go out and buy a 7D and find you get different results!

As a rough conclusion, I would say the iso3200 on the7D is about equivalent to the 40D at 1600. This is a good thing considering the extra resolution. I would say iso 3200 is very useable.

The AF seems spot on.

Some other stuff - the new AF system is intense. You need to press two buttons to change the AF mode (like single to multipoint), and then click the joystick to set your point.

I don't know if the 50D had this, but the DOF preview button is configurable, which is kinda neat.




  
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KenjiS
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Oct 01, 2009 03:15 |  #4

mrkgoo wrote in post #8739356 (external link)
Yeah, I know. Still, these were all settings on manual, so the exposure settings were actually the same. I was probably hovering at different distances between the shots too. Also looks like I missed focus on the 'H' a few times. So take from that what you will - don't blame me if you go out and buy a 7D and find you get different results!

As a rough conclusion, I would say the iso3200 on the7D is about equivalent to the 40D at 1600. This is a good thing considering the extra resolution. I would say iso 3200 is very useable.

The AF seems spot on.

Some other stuff - the new AF system is intense. You need to press two buttons to change the AF mode (like single to multipoint), and then click the joystick to set your point.

I don't know if the 50D had this, but the DOF preview button is configurable, which is kinda neat.

Eh hey im not criticizing, other people might, But I agree, it falls in line with what i felt seeing the pre-production 7D stuff that the 6400 was almost like 1600 on my 30D..Maybe a hair worse, But you're at 6400, Not 1600 ;)

Since the 40D was regarded as a stop better than the 30D...it would make sense then


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Oct 01, 2009 03:29 |  #5

Interesting shots, thanks for posting! :) The in-camera NR looks like it does quite a nice job ... although it would be nice to see some more complex subjects with fine detail to see how it handles the detail ....

Cheers :)


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Oct 01, 2009 04:58 |  #6

Looks good, very tempting in fact. I got rid of my 50D as I felt it noisier than my old 40D...if the 7D beats 40D on noise (which these suggest) and with 18Mp that is a huge achievement from Canon!!


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Oct 01, 2009 06:04 |  #7

robonrome wrote in post #8739580 (external link)
Looks good, very tempting in fact. I got rid of my 50D as I felt it noisier than my old 40D...if the 7D beats 40D on noise (which these suggest) and with 18Mp that is a huge achievement from Canon!!

x2 this camera is a winner


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e02937
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Oct 01, 2009 06:08 |  #8

Thanks very much for your efforts!


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Oct 01, 2009 06:49 |  #9

KenjiS wrote in post #8739334 (external link)
7D is substantially cleaner here...

However to warn you, You're going to get people complaining the 40D shot is lit different and its darker... ;)

Hard to tell, because of the difference in lighting.

A different subject would also show how much detail loss accompanies higher ISO's.
Thanks for posting these.

There is another thread with real world shots (soccer game) and the ISO3200 shots, for me, are not usuable.

(This from someone that really wants/hopes the 7D to be good at ISO3200)


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Tom ­ W
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Oct 01, 2009 07:00 |  #10

KenjiS wrote in post #8739334 (external link)
However to warn you, You're going to get people complaining the 40D shot is lit different and its darker... ;)

Well, it is...

Not sure how much that alters the result, but the 40D image is darker. Whether it's set differently or just the slight change in angle of light, it is differently exposed and that can change the result.


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Oct 01, 2009 07:02 |  #11

KenjiS wrote in post #8739365 (external link)
Eh hey im not criticizing, other people might, But I agree, it falls in line with what i felt seeing the pre-production 7D stuff that the 6400 was almost like 1600 on my 30D..Maybe a hair worse, But you're at 6400, Not 1600 ;)

That seems like wishful thinking to me, but then I'm in the camp that sees the 20D-50D as capable of producing very similar output at high iso.


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Oct 01, 2009 07:35 as a reply to  @ bacchanal's post |  #12

is it just me or are the 400 ISO shots all softer than the rest (for both cameras)?

7D's looking good, if it doesn't band it's a winner.


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Oct 01, 2009 08:18 |  #13

bohdank wrote in post #8739792 (external link)
Hard to tell, because of the difference in lighting.

A different subject would also show how much detail loss accompanies higher ISO's.
Thanks for posting these.

There is another thread with real world shots (soccer game) and the ISO3200 shots, for me, are not usuable.

(This from someone that really wants/hopes the 7D to be good at ISO3200)

Those shots in the other thread certainly didn't look as good in terms of noise as others I've seen. I suspect it's probably too early to draw any firm conclusions, and that the higher-ISO images will get "better" as the post processing software catches up with the 7D and people get more experienced in how to best use noise reduction on its images.


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mrkgoo
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Oct 01, 2009 10:44 |  #14

To clear things up, this wasn't lit differently - unless the bulb I was working under was changing. Furthermore, the settings are manual, so the shutterspeed and aperture values are identical. However, as I said, these were handheld, so I was probably shifting in between shots. My only explanation is that the 40D takes images slightly darker - maybe something is wrong with the calibration.

Iso 400 is softer - there may be slightly more movement there (shuuterspeed is on 1/15s). Yeah, it admit it's not the best test condition, but it does give an indication.

I'm going to give this puppy a whirl in the real world today!




  
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Oct 01, 2009 10:48 |  #15

Maybe something in the new sensor design, maybe also why the ISO performance doesn't seem to be as bad as was predicted before the 7D was actually out. This certainly makes comparisons a bit harder if the two do not appear to have the same exposure even if the settings are all the same.


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My 7D iso test (including vs. 40D) 56K no.
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