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

 
joonrhee
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Jan 11, 2013 10:20 |  #16

Thanks for doing the comparison Julian. 1DX looks like a winner!! 5DIII doesn't seem like a slouch by no means, but you could definitely start seeing some difference from 12800 and up. Nice!


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Jan 11, 2013 10:50 |  #17

Same lens on each body? I don't see you mentioning that anywhere.


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Jan 11, 2013 10:53 |  #18

archer1960 wrote in post #15474958 (external link)
Same lens on each body? I don't see you mentioning that anywhere.

Yes, shot with the 50L.


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Jan 11, 2013 10:57 |  #19

Julian, I'm not an owner of a 5D3 but perhaps you can explain why the full images are the same size and the zoomed in comparison images the 5d3 is quite a bit bigger? Like the difference in exposure, this will also impact on how much noise is perceived won't it?


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Jan 11, 2013 12:02 |  #20

Snowyman wrote in post #15474991 (external link)
Julian, I'm not an owner of a 5D3 but perhaps you can explain why the full images are the same size and the zoomed in comparison images the 5d3 is quite a bit bigger? Like the difference in exposure, this will also impact on how much noise is perceived won't it?

When I say "full images", I meant the entire image at the desired output dimensions. For instance, if you take an image from the original 5D (12mp) and an identical image with the 5D3 (22mp), keeping same distance between camera and subject (so that PoV is the same), same lens with same focal length (so that FoV is the same), then the final image will look the same. The exception would be that you have a 12 megapixel image versus a 22mp one.

The 1DX is only 18mp, and the 5D3 is 22mp. The physical size of the sensor is the same, just the number of pixels are different. This is why the full images appear the same, but when zoomed in, the 5D3 image looks like there's more "magnification", and that's the result of higher pixel density on the 5D3 sensor.

I hope I read your question correctly and helped provide an explanation for it. If not, I'll blame it on my ESL. :lol:


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Jan 11, 2013 13:15 |  #21

jwcdds wrote in post #15475241 (external link)
I hope I read your question correctly and helped provide an explanation for it. If not, I'll blame it on my ESL. :lol:

I see, I should have looked at the mega-pixel count, for some reason I assumed the 1Dx sensor had more pixels! :shock:


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Jan 11, 2013 13:31 |  #22

Snowyman wrote in post #15475518 (external link)
I see, I should have looked at the mega-pixel count, for some reason I assumed the 1Dx sensor had more pixels! :shock:

Nope. Fewer, but better, pixels!!


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Jan 11, 2013 13:35 |  #23

Round 2, Part I: Low-Light comparison.

I closed the blinds, turned off the ceiling lights, and decided to give a more realistic condition as to when high-iso would be used. (Granted it's still brighter than candlelight.) Part II will be of a different subject, under same lighting conditions. Except this time I took a photo of my 7D, with the black camera body, I thought that would help show the difference in shadow details, and that later I can use that to push the shadows/blacks to see signs of banding.

Once again, the 5D3 shows it's ~1/3 stop more sensitive so in LR, I dialed -0.3 exposure. Comparisons are from iso 6400, 12800, 25600, 51200.

Also different is that I'm doing this from work today. So screengrabs were originally 1920x1080 (instead of 1920x1200). Then uploaded to Smugmug, which then resized them to 1024 wide to meet image restrictions set on POTN.

Full image comparison: (1DX left, 5D3 right)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-C6q9n4R/0/XL/low-light%201dx%20vs%205d3%206400%20full-XL.jpg



iso6400 crop: 1/80s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-NMjCHpt/0/XL/low-light%201dx%20vs%205d3%206400%20crop-XL.jpg



iso 12800 crop: 1/160s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-mVxKCKj/0/XL/low-light%201dx%20vs%205d3%2012800%20crop-XL.jpg



iso 25600 crop: 1/320s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-n5W7C2x/0/XL/low-light%201dx%20vs%205d3%2025600%20crop-XL.jpg



iso 51200 crop: 1/640s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-XxL4zzT/0/XL/low-light%201dx%20vs%205d3%2051200%20crop-XL.jpg

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Jan 11, 2013 13:40 |  #24

jase1125 wrote in post #15474177 (external link)
Thanks for doing the comparison. Can someone volunteer to buy me a 1dx so I can validate the findings? :)

+1. The more I read about the 1Dx, the more I want to try one out from CPS, although I still cannot afford one. thank you.


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Jan 11, 2013 13:41 |  #25

That difference is small at 6400, but sure goes up fast above that even with the 5D3's exposure cut back.


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Jan 11, 2013 14:04 |  #26

Round 2, Part II: Low-Light comparison.

I haven't pushed any shadows/exposures/blac​ks in these images. This set of comparison was mostly to show differences in shadow details at "regular" exposure at high iso.

As usual, the 5D3 shows it's ~1/3 stop more sensitive so in LR, I dialed -0.3 exposure. Comparisons are from iso 6400, 12800, 25600, 51200.

Screengrabs were originally 1920x1080. Then uploaded to Smugmug, which then resized them to 1024 wide to meet image restrictions set on POTN.

Full image comparison: (1DX left, 5D3 right)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-p4h3Pvz/0/XL/low-light%20part%202%201dx%20vs%205d3%206400%20full-XL.jpg



iso6400 crop: 1/60s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-5kXHWVL/0/XL/low-light%20part%202%201dx%20vs%205d3%206400%20crop-XL.jpg



iso 12800 crop: 1/125s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-c34rRMq/0/XL/low-light%20part%202%201dx%20vs%205d3%2012800%20crop-XL.jpg



iso 25600 crop: 1/250s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-7gvdwQK/0/XL/low-light%20part%202%201dx%20vs%205d3%2025600%20crop-XL.jpg



iso 51200 crop: 1/500s, f/4.0 (5D3 also reduced exposure by -0.3 in LR)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-nzGpjh7/0/XL/low-light%20part%202%201dx%20vs%205d3%2051200%20crop-XL.jpg

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Jan 11, 2013 14:33 |  #27

Thanks.


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Jan 11, 2013 14:41 |  #28

It would be cool to see 5dmkiii vs 7D too! Time permitting... Maybe start at 3200.


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Jan 11, 2013 14:51 |  #29

Allan.L wrote in post #15475856 (external link)
It would be cool to see 5dmkiii vs 7D too! Time permitting... Maybe start at 3200.

Oh that's going to be ugly for the 7D. :lol: But I just might have time today. Here's the catch. I have the 24/50/85 primes with me. (I technically have my 200L and 100-400 with me too but I'm not going to shoot with those in the office, though technically I could use the 100-400 and change focal length so that FoV and PoV could be same, but I don't know how much optics will play into it.)

7D has the 1.6x crop factor. Do you want me to keep the same perspective/PoV (camera-subject distance unchanged), or do you want me to keep the same FoV (camera-subject distance changed for "similar" framing, but changing perspective? I don't think I have time for both.


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Jan 11, 2013 15:16 |  #30

Round 3: Pushing Shadows / Exposures (I think I did this test wrong. See later thread for the shadow recovery/banding samples :lol:)

This was all the rage a year or two ago, I think. Though I might be doing this test wrong. I think I'm suppose to shoot at iso 100 and push to see banding. (When I have some time, I'll toy with iso 100/200 and see. But if I don't get to it, sorry.)

I'm using the same iso6400 files used during the Round 2, Part II comparisons. Settings were iso6400, 1/60s, f/4.0. (lens was the 50L). Left side of the image is as shot, right side is after the adjustment made with LR slider.

Pushing shadows & blacks value to +100 (1DX top, 5D3 bottom)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-TFpVzqf/0/XL/1dx%206400%20pushed%201-XL.jpg
IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-5dwJDhj/0/XL/5d3%206400%20pushed%201-XL.jpg


Pushing exposure by 4 stops (1DX top, 5D3 bottom)

IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-m62sKk8/0/XL/1dx%206400%20pushed%202-XL.jpg
IMAGE: http://julianchen.smugmug.com/Misc/1DX-vs-5D3/i-MtbmL4W/0/XL/5d3%206400%20pushed%202-XL.jpg

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1DX vs. 5D3 (High ISO Comparison)
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