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Thread started 11 Jan 2013 (Friday) 01:06
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1DX vs. 5D3 (High ISO Comparison)

 
smclaren
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Jan 16, 2013 03:20 |  #121

gh patriot wrote in post #15492858 (external link)
This is a tiny little low res image. This image doesn't prove anything.:lol:

Same bird all the way up.


ISO 3200: http://www.flickr.com …/in/set-72157616909917519 (external link)

ISO 6400: http://www.flickr.com …in/set-72157616909917519/ (external link)

ISO 12800: http://www.flickr.com …in/set-72157616909917519/ (external link)

ISO 25600: http://www.flickr.com …in/set-72157616909917519/ (external link)

ISO 51200: http://www.flickr.com …in/set-72157616909917519/ (external link) :D




  
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gh ­ patriot
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Jan 16, 2013 07:05 |  #122

Ok, well as I thought, the image looks descent small but that's about it. It is good for 51200 but it still looks pretty bad when looked at larger than a small web image. I was impressed with ISO12800 with this image.


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TeamSpeed
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Jan 16, 2013 14:45 |  #123

As I expected... thanks for doing that Julian.

Several of us have been testing cameras back to back next to each other for years now, and have seen this trend:

1) Each generation seems to manage noise better at the processor level (software/firmware, what-have-you), not necessarily at the sensor hardware level
2) The only changes Canon has made to their sensors were changing the well sizes and then the gaps between each sensel, if I am using the correct terms. Nothing else radically has changed over the years.
3) Resolution differences between different formats across different generations forces us, the consumer, to try to figure out the real performance differences by resizing images one to the next, or trying to change the focal length to keep the same number pixels on target between two formats as best we can, etc. That is almost always an epic fail.

These ISO performance numbers that we throw around is much like car performance parts, that air cleaner gets you 10hp, the exhaust 40hp, the throttle body 15hp, and so if you do all 3, you get 65hp. NOT....

If the 5D2 is 1.3 stops better than the 7D, and the 1D4 is .5 stop better than the 5D2, and the 5D3 is .5 stop better than the 1D4 and the 1DX is 1 stop better than the 5D3, then the 1DX should be 3.3 stops better than the 7D.

As evidenced, it just isn't so. :) What is really the truth is that the newer generations are more consistent at getting great high ISO performance across a range of situations, so you can be more sure of your results and processing is more consistent afterwards. That is my opinion anyways. Flexibility at missing exposures and more consistent noise results at high ISOs is a great thing because you can get your bearings on how to shoot what and how to process it afterwards. Also, Canon is getting better at massaging those high ISO results from the sensor into something much more usable.

For fun, it would be interesting to see an ISO 3200 difference from a 20D to the 1DX.


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ben805
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Jan 16, 2013 18:58 |  #124

TeamSpeed wrote in post #15496973 (external link)
For fun, it would be interesting to see an ISO 3200 difference from a 20D to the 1DX.

The result would be like comparing Toyota Corolla to Corvette Z06. :)


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kouasupra
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Mar 20, 2013 03:02 as a reply to  @ ben805's post |  #125

I've been doing some shooting with this new camera and the ISO performance is amazing. I honesty think it's much more cleaner then my 5D3. Just wanted to confirm it with everybody.

Thanks Julian for the ISO test. :)




  
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boerewors
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May 14, 2013 07:31 |  #126

having looked through this thread i have concluded that going to a 5d3 from my 60D wont improve noise much. looks like only half to 2/3 of a stop better. but IQ seems quite a bit better with regards to colour. the 1 Dx looks around 2 stops better than the 7D but what amazes me so much is the colours are so much better, especially in the red channel. pity i could never own one :(
im thinking to upgrade to a 6D rather than a 5Dmk3. i would like to see a comparison between a 7D and and a 6D. my bets are that its atleast a stop better than the 7D and 1/3 cleaner than a 5D3. well thats just what ive heard. if it is then i have my eyes on a 6D


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TeamSpeed
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May 14, 2013 11:00 |  #127

The 5D3 should be about 1 1/2 to 1 2/3 stops better. The 5D2 betters the 60D by just over one stop, and the 5D3 gains this by a bit more. This is based on both historical comparisons of the crop sensor to the 5D2, and then 5D2 vs 5D3 comparisons.

I highly doubt that a raw exact exposure from the 60D and 5D3 at high ISOs is only 1/2 to 2/3 stop different, and have seen comparisons made here and on FM to confirm that.

You can see even on reply 103 that the 7D 6400 is still a bit dirtier than the 5D3 12800 shot right below it. How much beyond that 1 stop is pretty subjective if you just look at the images on the screen vs running the images through some sort of analyzer.


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bulldog-yota
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May 14, 2013 12:49 |  #128

Maybe I'm missing something, but if we compare a crop to a FF the FF has 2.6x the sensor area. So it can capture 2.6x as much light, and with similar sensor technology I would expect to see a bit more than 1 stop difference. However it may be reasonable to think that the lost surface area between pixels (photo diodes) doesn't shrink down as linear as the sensor size shrinks down, which may lead to the difference in pixel size actually being more than 2.6x for the FF.

Does anybody actually have the accurate size of the photo diodes on the 1Dx, 5DIII & 7D? Not just the sensor size and MP calculation, but the actual size.

Also as most electronics, the S/N ratio doesn't drop linear beyond a certain point, and that may be why we see a bigger discrepancy than expected between FF and crop at a certain point.




  
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CyberDyneSystems
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May 14, 2013 13:17 |  #129

Going all the way back to the firs tpage, sorry for going ot but;

However, the truth of the matter was that I didn't know the 5D3 was acting 1/3 stop faster until I had uploaded the images

I have found this by accident.
All previous EOS cameras I have shot with except the old 10D, I have set the "default" exposure to be plus 1/3rd EC in AV mode. Often I end up plus 2/3rd EC.

With the 5D3 I quickly discovered I should actually use the camera at "flat" no EC most of the time.
I think this is the same 1/3rd stop you noticed in this test.


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boerewors
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May 14, 2013 17:48 |  #130

Having looked at the iso comparisons on dpreview i see the evidence that the 6D is atleast a third to 2/3 stops cleaner than the 5D3 at ISO6400. And i found the 7D is almost as clean as the 5D3 When compared at ISO3200. Ie: look at 5D3 at ISO6400 and 7D at ISO 3200 and you will see that its quite close. It looks to me like 5D3 is around 1&1/3 stops cleaner than a 7D and the 6D is almost 2/3 stops cleaner than the 5D3 or you can say the 6D is almost exactly 2 stops cleaner than the 7D. Thats what i gather by looking at dpreviews iso comparison at least.


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1DX vs. 5D3 (High ISO Comparison)
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