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Author Topic: 70D vs D7100 ISO Comparison at 100%  (Read 27088 times)

neuroanatomist

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #15 on: August 31, 2013, 10:55:27 AM »
Ok, I conclude that the D7100 has problems with color fidelity and exposure metering that occur specifically at ISO 800.  Maybe it wasn't a useless test after all...   ::)
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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #15 on: August 31, 2013, 10:55:27 AM »

ajfotofilmagem

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #16 on: August 31, 2013, 11:06:20 AM »
Ok, I conclude that the D7100 has problems with color fidelity and exposure metering that occur specifically at ISO 800.  Maybe it wasn't a useless test after all...   ::)
That's good to know. ;) Just never use the D7100 in ISO800 and everything is great! ;D ;D ;D ;D

Badger

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #17 on: August 31, 2013, 11:24:16 AM »
I was just curious to see how these two cameras did, hand held with auto white balance at different ISOs :-)
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ishdakuteb

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #18 on: August 31, 2013, 11:26:46 AM »
Give me the raw files and I let you know what can be seen or not

number of people in this forum have been asking for your raw files for more almost 2 years.  have you posted one? none... then why bother to ask people to send you a raw file?

You think this might turn into another long bumpy ride?  ;D

where is the link to your photography page?  should you be proud to let people see your artist side lol

risc32

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #19 on: August 31, 2013, 12:01:50 PM »
probably because that swatch turns orange at all iso settings except red at iso800 on the nikon. i'm not on a calibrated monitor right now, and i can't say what is more accurate, but certainly iso 800 looks much different then any of the others.
« Last Edit: August 31, 2013, 01:07:38 PM by risc32 »

neuroanatomist

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #20 on: August 31, 2013, 02:02:57 PM »
Ok, I conclude that the D7100 has problems with color fidelity and exposure metering that occur specifically at ISO 800.  Maybe it wasn't a useless test after all...   ::)
how did you come to that conclusion?

Isn't it obvious?  The ISO 800 shot from the D7100 is underexposed and the color balance is off, compared to the other D7100 shots.  Therefore, based on this test, the D7100 has a problem at ISO 800.   ::)  ::)  ::)
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ishdakuteb

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #21 on: August 31, 2013, 04:58:44 PM »
i have lent people my raw files, Im relatively new here but at preview they are used to get my raw files   since 2001 where Im a senior member

I have not be printing a business card since 10 years, back  i took down my Picture Bank years ago, you se I have enough of customers and  need not to show off  my self,  but you can always google at my name
questions?


1. "i have lent people my raw files":  please raise your hands if there is a person in this forum has received ankorwatt raw file
2. "Im relatively new here":  yes, you are new with a new nick name but pretty old with nick Mikael Risedal which was banned
3. "need not to show off  my self":  i am not sure what you can show off in this forum?  at least not to me.  but i do respect mr.  MichaelTheMaven since i did learn something from his youtube videos back to the day when i fisrt start with dslr
4.  "i took down my Picture Bank":  i have seen some of your SNAPSHOTS taking in indochina, but nothing interested... want to see some interested images taking in the same places?  here is one of the link:  http://www.peterphamphotography.com/ or search for Don Hong-Oai for photo painting
5.  "but you can always google at my name"  for what?  since there is nothing that i can learn from you.  if you offer some great tutorials helping me taking great images, i will certainly look for your name.  but i do not think you have this chance any more with available light since i am way pass your skills in this area.  well, i am starting to learn strobist... know strobist or some skills like Erik Johansson?  put up some tutorials, i put your name into my search list LOL

questions?
« Last Edit: August 31, 2013, 08:50:05 PM by ishdakuteb »

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #21 on: August 31, 2013, 04:58:44 PM »

horshack

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #22 on: August 31, 2013, 05:34:28 PM »
The High ISO performance between two competing bodies of the same generation are very close, which means two things:

1) The differences aren't that important in actual, practical use.

2) To measure those small differences you have to use an exacting methodology. This means the same absolute exposure (aperture/shutter speed) with the same lighting. Matching the aperture requires using the same lens on both bodies, which for Canikon means using a Nikon-mount lens with a manual aperture ring, and adapting the lens to the Canon body using a F-mount -> EF mount adapter. Failing to use the same lens on both bodies means the actual aperture/t-stop can vary by up to or more than a 1/2 stop, which is larger than the actual High ISO difference between most bodies of the same sensor size. Naturally you also have to use a tripod, timer release, MLUP, and identical framing.

scottkinfw

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #23 on: August 31, 2013, 06:58:51 PM »
Regardless of results, I am not about to "jump ship", like a recent poster, just for a test.  Now if a new Canon body or lens came out that had some great feature or spec that I had to have, that would be another story.  However, the point has been mad many times, it is the whole system that counts.  Not withstanding the validity of this test.
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Plus lots of stuff that just didn't work for me

Marsu42

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #24 on: September 01, 2013, 01:57:13 AM »
1) The differences aren't that important in actual, practical use.

I wouldn't say that, since iso noise is the main limiting factor on crop even a 1/2 stop gain might very well make a difference to some - it's not much, but it will show on each and every image you produce. And when you downsample the 24mp d7100 to 18mp and compare with the current Canon crop sensor, there will be more than nothing to see.

2) To measure those small differences you have to use an exacting methodology.

+1

neuroanatomist

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #25 on: September 01, 2013, 07:58:43 AM »
Ok, I conclude that the D7100 has problems with color fidelity and exposure metering that occur specifically at ISO 800.  Maybe it wasn't a useless test after all...   ::)
how did you come to that conclusion?

Isn't it obvious?  The ISO 800 shot from the D7100 is underexposed and the color balance is off, compared to the other D7100 shots.  Therefore, based on this test, the D7100 has a problem at ISO 800.   ::)  ::)  ::)

or the photographer to handle the camera

Wait, wait...are you suggesting that someone can conduct a 'test' in such a way that it appears there's a 'problem' or 'defecit' with the camera's performance, but it's really just the fault or bias of the person conducting the 'test'?  What an amazing idea... Gee, I wonder if that's happened anywhere else on this forum?
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Jim O

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #26 on: September 01, 2013, 08:18:43 AM »
as I said, google
is there anything you particularly want to know? I was among the first in Sweden  to go to the digital process and  that I have scanned film about 10years before  digital camera came along, I've been co  authors of numerous articles, I have 30 long years  of working experience  as a photographer?

I do not plan to argue with you but I am curious. I am new here and you seem, well you seem to be fairly opinionated. I have googled you and find little more than argumentative posts here and elsewhere, a few photos from Lund University, and one on Wiki of Martin Saarikangas. By the way, are his teeth really that yellow? I didn't find any serious articles but perhaps they are hard to find hidden among your rants, raves, insults, and boasts here and elsewhere. Can you point us to say, a half dozen or even better a dozen of these "numerous articles". It's ok if they're in Swedish. I can use Google Translate.
When people see you arguing with an idiot on the internet, all they see is two idiots arguing.

Marsu42

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #27 on: September 01, 2013, 03:45:42 PM »
BOB N has now presented the figures for 70D regarding read out noise, DR etc

Interesting - I can understand the large dr difference, but would anybody please care to explain to poor /me what read noise and saturation mean for real world shooting?

I tried to look at the explanations (from http://www.clarkvision.com/articles/digital.sensor.performance.summary/index.html) - but they are very technical and according to these numbers, both the 5d3 and 70d have to be complete junk @iso100 which doesn't seem to hinder even pros using them. So what's the real world difference?

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #27 on: September 01, 2013, 03:45:42 PM »

celestyx

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #28 on: September 01, 2013, 03:52:38 PM »
BOB N has now presented the figures for 70D regarding read out noise, DR etc
here we can se 70d in comparison with one Toshiba and one Sony made sensor
The read out noise is 4,35 times higher , compare this to 5dmk3 vs d800 there 5dmk3 has 12,2 times higher read out noise.

Why is it the measured ISO are so different from the reported ISO?
Shouldn't this be taken into account when we compare the noise of cameras at high iso?

neuroanatomist

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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #29 on: September 01, 2013, 03:54:38 PM »
if you take a look at dpreview and 800iso from d7100 and 70D there is not any strange with 800iso from any camera

Thanks to you and your 30 years experience for clearing that up, I'm sure glad to know the D7100 doesn't have a problem at ISO 800.  Now I feel a little embarrassed for all those posts I almost made on Nikonrumors about the "D7100 ISO 800 problem," silly me.  But you've cleared it all up for me, Mikael - I really thought the test reported here was valid and well executed.  Or did I?  Let's take a look and se what I wrote above, and try to read and  understand about tests and validity.
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Re: 70D vs D7100 ISO Comparison at 100%
« Reply #29 on: September 01, 2013, 03:54:38 PM »