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Archive 2012 · IQ 40D vs 7D low ISO?

anthonygh
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p.1 #1 · IQ 40D vs 7D low ISO?

Simple query really...anyone done shoots with both bodies and have an opinion on how they perform up to ISO 200...which is where I do my studio shoots with a 40D, a 1V with HP5 shot and deved at 200 ISO..My max print size is A3 plus and both the 40D images and the scanned 35mm images are pretty good at that size....

Jan 05, 2012 at 04:20 AM

RobDickinson
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p.1 #2 · IQ 40D vs 7D low ISO?

7D has a lot more detail, more (by a little )dynamic range, similar colour sensitivity and tonal range.

You do start to see diffraction at higher than f8 but you shouldnt need that anyhow..

At A3 the 7D will give you 324dpi, the 40D 240dpi.

Jan 05, 2012 at 04:58 AM

surf monkey
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p.1 #3 · IQ 40D vs 7D low ISO?

I moved up from my 40D to a 5D2, but eventually got a 7D as a backup.
I think that the low ISO on th 40D is cleaner at 100% pixel-peeping, of course the 7D has more pixels.
I don't think the 7D's low ISO noise would be a problem at A3 print size, unless you have severely underexposed the image.
You will also get a noticeable increase in detail with the 7D.

Jan 05, 2012 at 07:14 AM

Daan B
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p.1 #4 · IQ 40D vs 7D low ISO?

At A3+ I doubt you will see a big difference. If any difference at all. Especially if you shoot people in the studio. Of course the 7D is full of features and is the better camera, but for studio work I don't see the relevance.

Jan 05, 2012 at 07:33 AM

surf monkey
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p.1 #5 · IQ 40D vs 7D low ISO?

At A3 there should be a difference in the fine details, like clothing textures and small type on product packaging. The difference may not be a big deal for most, but I can see the difference. I think that the ability to crop more has it's merits as well.

Jan 05, 2012 at 07:39 AM

RobertLynn
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p.1 #6 · IQ 40D vs 7D low ISO?

Yes I have. 7D beats in all areas.

My tests weren't "scientific" enough though, because I used a zoom and accidentally bumed it from like 55to 46mm though.

password is 7disgreat

http://roblynn.smugmug.com/Still-Life-an/Reserved-Client/10663044_xCVxXk#742100265_mU2hM

http://roblynn.smugmug.com/Still-Life-an/Reserved-Client-7/10663133_8d2hQG#742171605_ZhdB2

Jan 05, 2012 at 12:44 PM

Gubat
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p.1 #7 · IQ 40D vs 7D low ISO?

I find the 40D to be softer, so you need to do the sharpening on DPP or other PP softwares.

Jan 05, 2012 at 01:00 PM

AaronNegro
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p.1 #8 · IQ 40D vs 7D low ISO?

Hi Robert, took the freedom of cropping your pictures at low ISO and downsize the 7D to a size more or less like the 40D.

I hope it helps the OP.

Edit: I see the focussing on the 7D is a bit off and the size is different but I tried at least.

Jan 05, 2012 at 02:08 PM

RobertLynn
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p.1 #9 · IQ 40D vs 7D low ISO?

Yeah my test was hardly scientific, and I wish I would've done multiple exposures and checked focusing. You know what I mean? I dicked it up, because what I did was like focus/recomp on the tripod. It was awhile ago, but if I had access to a 40d I'd do it again with a prime (at that point I didn't own a prime; just zooms).

They were processed the same way, but flash was ettl I believe.

Also for what it's worth, my 7d and old 40d produce sharp captures.

Jan 05, 2012 at 03:08 PM

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