Canon EOS 7D Master thread

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Archive 2009 · Canon EOS 7D Master thread

thw2
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p.176 #1 · Canon EOS 7D Master thread

headroom wrote:
Simply dont use Auto AF select, all Canons do this with the Setting Auto....

My 450D does NOT do that.

Jeff wrote:
Unless he recomposed after focusing, there is simply no reason that the camera should have focused on (or near) the tree in the foreground, based upon the camera's selection of AF points.

Auto selection AF on 7D ALWAYS picks the nearest subject regardless of what it indicates. I really do not know why. If all the objects in a scene are ~ same distance from camera, auto selection AF fails completely.

Looks like this is a serious AF algorithm issue in the 7D that needs to be addressed.

Jan 23, 2010 at 11:55 PM

skibum5
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p.176 #2 · Canon EOS 7D Master thread

ISO320, f/4.5, 300 2.8 IS + 1.4x TC II, ACR 5.6, 100% crop:

This image is copyrighted by the owner

WOW, I just noticed something, this didn't seem as sharp as I remembered, even though I even tried using the smugmug "-O" extension so I compared to the original JPG and it is NOTICEABLY less crisp! It seems like smugmug has gone to forceably recompressing all images or something

Or maybe they still store the original and use the for printing and downloads but simply dont allow -O linking for posting to webpages or for display anymore, even if you manually type -O now it still uses -X3 or something

You know I thought for the last few months some of my posting of details shots hadn't had as much impressive detail as I had thought and well this might explain it. Wow, it would be unfortunate if smugmug doesn't allow true original linking.... I think the others do.

Unless maybe manually renaming it -O meant it recompressed the -X3 trying to make an -O which it didn't call the original because it was not big enough

I need to compare with -O vs -X3....

nope

they both look noticeably filtered! So smugmug has begun pulling fastones

Or what is going wrong?

anyway it seems like smugmug may no longer be useful for 100% crop comparisons or demonstrations....

this stinks, otherwise I had been really liking smugmug....
just compared it again and it's like the image was taken with two different cameras, the smugmug version that you see when you read this posting is very definitely softened and blurred compared to the original!

anyway, unless i messed something up, it might be something keep in mind if you compare 100% crops you see posted to your own personal files and then think all the new cameras are soft

Edited on Jan 24, 2010 at 01:49 AM · View previous versions

Jan 24, 2010 at 01:27 AM

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p.176 #3 · Canon EOS 7D Master thread

Im much happier since my 7D returned from Canon Service. Now while the below example is not a great photo I think it is still a good example of the ISO performance and overall performance of the 7D.

This is handheld at 1250 ISO with a Sigma 105 2.8 at 5.6 with shutter of 1/100 no IS of course. This is out of camera with exception of slight sharpening of her left eye (eye on right in image). I could not produce anything close to this prior to sending back to Canon.

100% crop

Reduces full shot

Jan 24, 2010 at 01:49 AM

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p.176 #4 · Canon EOS 7D Master thread

How feasible would it be for Canon to produce a Video Lens for their DSLR bodies that shoot HD video? Its seems they could make one where the focusing is done by the lens so it operates like a camcorder and also implement a motorized zoom in the lens with a wide / telephoto button for zooming right on the lens itself.

Jan 24, 2010 at 11:26 PM

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p.176 #5 · Canon EOS 7D Master thread

ohyeah wrote:
Just checked and it shows a status of shipped, supposed to be here on Monday. Hopefully there's some sort of detailed repair slip with the camera as nothing was listed on Canon's web site. I'll definitely test it that day, and try to post an update here. I'm keeping my fingers crossed that it will be good news.

Wow, they shipped it to the wrong address. I checked and I gave them the correct address. I sure hope their shipping accuracy doesn't reflect on their repair accuracy. I had to call FedEx and give them the correct address, so I will get it tomorrow. What a PITA. I really hope they fixed the problem, and not roll their eyes and send it back with some lame excuse like the dealership does when I take my car in for service!!

Jan 26, 2010 at 12:41 AM

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p.176 #6 · Canon EOS 7D Master thread

Got my 7D back, has exact same focus issue. the single and spot AF are fine, switch to zone and it's WAY off, not even close. And yeah, got the typical found focus, adjusted, blah blah blah....

Jan 26, 2010 at 07:52 PM

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p.176 #7 · Canon EOS 7D Master thread

Ohyeah.. Im going to try some zone test shots today and see what I come up with.

Jan 26, 2010 at 09:11 PM

python2000
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p.176 #8 · Canon EOS 7D Master thread

http://econstories.tv/home.html

Jan 27, 2010 at 04:22 AM

ohyeah
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p.176 #9 · Canon EOS 7D Master thread

Good news is the Spot AF is now dead on at 0 MA, as opposed to -8 before I sent it in (for both the 70-200 and 100-400). Now if Canon can just get that same accuracy in all focus modes....

Jan 27, 2010 at 02:05 PM

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p.176 #10 · Canon EOS 7D Master thread

ohyeah wrote:
Good news is the Spot AF is now dead on at 0 MA, as opposed to -8 before I sent it in (for both the 70-200 and 100-400). Now if Canon can just get that same accuracy in all focus modes....

How much did they charge you when you sent your lenses in with it?

Jan 28, 2010 at 12:23 AM

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p.176 #11 · Canon EOS 7D Master thread

Don't know if this has been posted. A video that's making all of the economics nerd blogs. Says it was filmed entirely with 7D. It pits the great economists Keynes and Hayek in a rap to solve the boom/bust cycle. Photography and Economics in one package, two of my favorite things. http://econstories.tv/home.html

Just saw this and it is pretty funny. What's not funny is that this was shot on a 7D...pretty amazing if you ask me. Thanks for the post python.

Jan 28, 2010 at 03:25 AM

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p.176 #12 · Canon EOS 7D Master thread

I was thinking about how lenses can be out resolved by the sensor, and was wondering at what point it's worse than a 'lesser' camera where that isn't the case? For example, does a 1d2 printed at 12x18 look better than a 12x18 print from a 7D that is suffering negative effects on IQ because the lens is out resolved? For imaginary test purposes, assume they used the same lens. I would imagine there's a point in print size where the negative effects of an out resolved sensor are noticeable, am I thinking about this correctly?

Jan 28, 2010 at 05:13 AM

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p.176 #13 · Canon EOS 7D Master thread

corndog wrote:

I was thinking about how lenses can be out resolved by the sensor, and was wondering at what point it's worse than a 'lesser' camera where that isn't the case? For example, does a 1d2 printed at 12x18 look better than a 12x18 print from a 7D that is suffering negative effects on IQ because the lens is out resolved? For imaginary test purposes, assume they used the same lens. I would imagine there's a point in print size where the negative effects of an out resolved sensor are noticeable,

am I thinking about this correctly?

no

sorry, no time to explain now

Jan 28, 2010 at 07:10 AM

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p.176 #14 · Canon EOS 7D Master thread

droopy1592 wrote:
ohyeah wrote:
Good news is the Spot AF is now dead on at 0 MA, as opposed to -8 before I sent it in (for both the 70-200 and 100-400). Now if Canon can just get that same accuracy in all focus modes....

How much did they charge you when you sent your lenses in with it?

I just sent in the body (since the problem is consistent with all of my lenses).

Jan 28, 2010 at 02:04 PM

Jammy Straub
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p.176 #15 · Canon EOS 7D Master thread

Think about it like you would defraction. All things being equal a 24mp sensor at f/16 will never look worse than an 8mp sensor at f/16, it can at worst only look the same or better.

Same thing for a lenses resolving ability. If the lens can resolve 50 line pair per mm, then that's it. But an 8mp camera may only resolve 40lp/mm while the 24mp camera might be able to resolve 60lp/mm. However the lens will limit it to 50lp/mm, even then the 24mp camera isn't going to look worse than the 8mp camera. That 24mp camera will never go below 40lp/mm before the 8mp camera does (say if we were shooting both at f/22 on that same lens)

You could think of it like this, the higher resolution sensor is showing lens faults that were previously masked by a lack of resolution before.

I'm sure there's math or something that explains all this

All of these numbers are made up for the sake of example.

Jan 28, 2010 at 07:47 PM

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p.176 #16 · Canon EOS 7D Master thread

I think I got it, thanks for the explanation. It sounds like, in an odd way, out resolving is almost a good thing. Ultimately I understand that it's not, but at least it means you've made the most of your lens!

Should images still be viewed at 100% while editing? Sharpening these noisy files at 100% is challenging.

Jan 29, 2010 at 01:45 AM

Bas Breetveld
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p.176 #17 · Canon EOS 7D Master thread

Hi,

I've done some testing with my wife's 7D and I am pretty surprised about the results now that I found a workflow that works for my. Photo's are processed with CS4; ACR 5.6 and only used minor NR in ACR and a tiny bit in PS; afterwards some selective sharpening with 'smart sharpen'. I've put a picture gallery on my website with samples of 1200 pxls. Foxes in cloudy weather in the snow are not the easiest target for any camera ...

http://www.naturereflections.nl/samples_7d/samples_7D.html

Best regards,

Bas

Jan 29, 2010 at 12:27 PM

ejmartin
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p.176 #18 · Canon EOS 7D Master thread

corndog wrote:
I think I got it, thanks for the explanation. It sounds like, in an odd way, out resolving is almost a good thing. Ultimately I understand that it's not, but at least it means you've made the most of your lens!

Yep.

Should images still be viewed at 100% while editing? Sharpening these noisy files at 100% is challenging.

Definitely still check detail and sharpness at 100%. The resampling algorithms used by photoshop to display images at lower resolution are extremely crude, as you can check by comparing an image viewed at 50% to an image downsampled by bicubic viewed at 100%; odd ratios like 66% are even worse.

You may want to use a larger radius for sharpening than in the past, if your lenses aren't up to taking full advantage of the sensor resolution, and the image data at the pixel level is substantially high frequency noise rather than high frequency detail. You may also want to do a light noise reduction only of high frequencies before applying NR.

Jan 29, 2010 at 02:17 PM

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p.176 #19 · Canon EOS 7D Master thread

Bas Breetveld wrote:
Hi,

I've done some testing with my wife's 7D and I am pretty surprised about the results now that I found a workflow that works for my. Photo's are processed with CS4; ACR 5.6 and only used minor NR in ACR and a tiny bit in PS; afterwards some selective sharpening with 'smart sharpen'. I've put a picture gallery on my website with samples of 1200 pxls. Foxes in cloudy weather in the snow are not the easiest target for any camera ...

http://www.naturereflections.nl/samples_7d/samples_7D.html

Best regards,

Bas

Wow. Stunning images.

Jan 29, 2010 at 05:36 PM

droopy1592
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p.176 #20 · Canon EOS 7D Master thread

Link doesn't work for me

Jan 30, 2010 at 02:04 PM

RonLander
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p.176 #21 · Canon EOS 7D Master thread

nor me

Jan 30, 2010 at 02:46 PM

kewlcanon
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p.176 #22 · Canon EOS 7D Master thread

The link was working a couple of days ago.

Jan 30, 2010 at 06:16 PM

Bas Breetveld
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p.176 #23 · Canon EOS 7D Master thread

Excuse me, data-limit on my website was reached. I'll let you know if it's aranged.

Best regards,

Bas

Jan 30, 2010 at 08:19 PM

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p.176 #24 · Canon EOS 7D Master thread

Well, unfortunately I'm sending my 7D back to Amazon. It just would not focus properly with almost every lens I tried. Those same lenses worked great my 20D or DsII. I did use the MA some and that would help, but I got concerned relative to how well it would work across the range on a zoom and at different distances. Now I need to decide if I want to try another one or bite the bullet and pick up a D4. I like having a crop body to along with DsII and liked the upgrades the 7D provided on paper over the 20D.

Jan 31, 2010 at 08:20 PM

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p.176 #25 · Canon EOS 7D Master thread

vpexp wrote:
Well, unfortunately I'm sending my 7D back to Amazon. It just would not focus properly with almost every lens I tried. Those same lenses worked great my 20D or DsII. I did use the MA some and that would help, but I got concerned relative to how well it would work across the range on a zoom and at different distances. Now I need to decide if I want to try another one or bite the bullet and pick up a D4. I like having a crop body to along with DsII and liked the upgrades the 7D provided on paper over the 20D.

This is exactly what mine was doing. And after a trip to Canon, it's much better but going back for a second time tomorrow. It now requires just about no MA for my other lenses in Spot or Single Point AF modes, but Zone AF and 19 Point Auto modes are still blatantly off. So I'm hoping that will get fixed. I'd sell mine and go with a 1D4, but can't afford it right now.

Jan 31, 2010 at 10:44 PM


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