1DIV vs 5DIII vs 7DII

Has anyone done test shots in the, say 1600-6400 ISO range, with the 1DIV, the 5DIII and the 7DII, same lens and same standpoint? I would be very interested to see how images, cropped and resized to the same size, compare in terms of detail, dynamic range, and of course, noise.
I am considering switching to Canon, and one of the three will be the choice. I really like the concept of the 7DII, and as I shoot mostly birds, it would suit, but I am not yet convinced about the image quality. I have yet to see anything that really jumps out at me the way shots with my Canon 400/5.6 USM mounted on my Olympus E-M1 do (MF and only f5.6, naturally....).
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IMAGE LINK: https://farm6.staticfl​ickr.com …98201744_7b092b​1f7f_o.jpg

Without empirical evidence to show but with previous ownership of a 7D, a 5D Mk II and now my current 1D Mk IV, I can positively, in my mind, say the 1D Mk IV is the best.

I shoot some birds and wildlife but I am a general photographer and the camera has to do what I want. The Mk IV is that and more.

Even if you just consider the build, the Mk IV has no peers. As for me, I now own a 1Ds Mk III and the 1D Mk IV and am completely satisfied. The batteries are the same. The menus are nearly the same and each feels the same in use. All factors to consider.

Of course all three bodies you listed have different field of views so there will be minor differences. That said the 1D4 is a great body.

Timely thread, I was about to ask a similar question. Looking forward to more here.

5D3 for IQ across the ISO range
1DIV for Speed and reach over the 5D3
7D2 for reach over the 1DIV

the 1DIV is amazing! 7D2 can't compete in the IQ category,,,,,,,,,,,,,

ebiggs wrote in post #17297421
Without empirical evidence to show but with previous ownership of a 7D, a 5D Mk II and now my current 1D Mk IV, I can positively, in my mind, say the 1D Mk IV is the best.

Agreed. For Birds, you get the best of all worlds with the 1D MK IV. The H sensor is 75% of full frame where the 7D C sensor is only 60%. The 1D MK IV coupled with the 500mm f/4 is formidable equipment (use a solid Gitzo tripod and Wimberly head) for birds. Long story short, get the 1D MK IV and leave the others for what they do best... 5D for landscapes and architectural, 7D is a nice light weight camera that does most everything very well. For birds, the 1D MK IV will give you IQ results that leave the others in the dust.

Thanks, guys. I really appreciate your input.
Let me explain...
I have been in photography for about 55 years now. I am fully aware of the differences of the three bodies and the crop factor and all that. What I want to find out is how the cropped and resized images compare, specifically, whether the better IQ of the larger sensors makes up for the lower sensor resolution. Actual resolution isn't everything, and sensor noise kills resolution! That is why I am particularly interested in the 1600-6400 ISO range.
My two main lenses are the 400mm/5.6L USM and a 600mm/6.3 triplet astro telescope, coupled with my Oly E-M1 (2X crop). Both are wonderfully sharp, especially the scope, (not even a hint of CA!) but naturally, only MF. Even though the E-M1 is a dream for MF work, and I am quite happy with the IQ as long as I don't have to push the ISO above 800 max, to be honest, I simply miss too many shots when things happen quickly, and have been thinking about an AF alternative for the last year or so. I decided to wait and see what the 7DII looks like before deciding, and to be honest, I am not yet convinced, though I really like the concept of the camera.

I just bought a 1D IV to pair with a 5D3, after buying and returning a 7D2. From what I have seen I would say 5D3 has least noise and most detail at 6400, 1D IV has 2nd most noise (managable noise) and equal detail to 5D3, 7D2 has most noise and least detail and sharpness. The noise is kinda smeary on the APSC, even though the 7D2 is the best one I have shot with. No APSC can compete with a 5D or 1D series though.

kobeson wrote in post #17299031
I just bought a 1D IV to pair with a 5D3, after buying and returning a 7D2. From what I have seen I would say 5D3 has least noise and most detail at 6400, 1D IV has 2nd most noise (managable noise) and equal detail to 5D3, 7D2 has most noise and least detail and sharpness. The noise is kinda smeary on the APSC, even though the 7D2 is the best one I have shot with. No APSC can compete with a 5D or 1D series though.

If you were comparing 100% views between the cameras, then there is your problem. Also if you used older lenses, even L, then there is your 2nd problem. That certainly doesn't seem to be the case in your situation, but it is still worth bringing up. The 7d2, being so much more dense than the other 2, requires better glass that can resolve to that level. Finally, you need to use faster shutter speeds to lock down the detail better.

One problem I have with both the 1DIV and the 5DIII is the shutter noise. I have more than once stood next to someone in a hide who has succeeded in scaring everything away with a burst of shots from a big Canon. The 7DII is quiet, for a dslr! 5DII also has a quiet mode, right? 1DIV not...?
I had a 5DII for a short while, but it too was loud, and the IQ couldn't match the E-M1. Slightly better higher ISO, but much less detail.

DanC.Licks wrote in post #17299051
One problem I have with both the 1DIV and the 5DIII is the shutter noise. I have more than once stood next to someone in a hide who has succeeded in scaring everything away with a burst of shots from a big Canon. The 7DII is quiet, for a dslr! 5DII also has a quiet mode, right? 1DIV not...?

Are you asking if the 1D Mk IV hs a "quite mode"? The 1D Mark IV offers a Silent Single shooting mode which, as the name implies, is a single shot mode that reduces operating noise. It works by spreading the shutter sounds out, holding the mirror up until you release the shutter button, and reducing the speed at which the mirror is lowered post-exposure. The net result is a fairly quiet operation that should prove helpful when photographing wildlife.

Yes, that is what I meant. Thanks. If it is set to Silent mode, is it really slow to respond? Is it a two step operation? That is, how noticeable is the delay from the time you bush the shutter release till the time the shutter actually releases? How does it behave with several shots fired in quick succession? You have to push the shutter button twice each time, right?
In the "old days" I worked as a pro for about ten years, and changed systems a couple of times before I settled on Leicaflex-R. It was so steady and the shutter was so quiet and vibration free compared to my Nikon Fs! A joy to work with, often with the 180/2.8 on it with Tri-X at 400 ASA, and 1/15-1/30 sec. wide open. Could never do that with the Niks.
The E-M1 is pretty quiet, but not as quiet as the E-M5 which is nearly silent. But mirrorless systems have their problems; bad at long focal lengths and for tracking (flicker) and for bursts (too much blackout and delay), and easily damaged/burned if sunlight shines directly into the eye-piece. I have had my EVF replaced three times in one year and it is due in for the fourth replacement. Naw, I will take a good OVF any day!

I sold my, well returned my 70d and picked up a 1d4. The silent mode was much more repsonsive, quiter, and quicker on the 70d than the 1d4. The 1d4 excels at everything else.

DanC.Licks wrote in post #17299291
If it is set to Silent mode, is it really slow to respond? Is it a two step operation? That is, how noticeable is the delay from the time you bush the shutter release till the time the shutter actually releases? How does it behave with several shots fired in quick succession? You have to push the shutter button twice each time, right?

Last question first, no, you press the shutter button once for each shot. There is no noticeable "delay" as it fires as quickly as it does in any other mode. The mirror returns to battery when you release the button.
The 1D Mk IV is a very speedy camera. A real speed demon. No other camera is as quick excepting the 1Dx. It is just fast at everything it does.
However in order to get this high speed things have to operate speedy and requires the appropriate guts.
I, too, have been into photography since 1955 with my first 35mm camera. A Argus C3.
I went through the Nikon stage with two Nikon F's. Finally got a Canon F1n and an A1.
There has been no turning back. Most noteworthy is the Canon lens line which is unmatched by any other maker.
Not to mention the early Nikon DSLR's were simply awful. Since Nikon has caught up and it has been a give an take lately. But Nikon does not have the lenses!
I probably have owned 50+ cameras over the years, probably 25 downstairs right now, and I can safely say the EOS 1D Mk IV is the best so far.
I no longer use anything except the 1D Mk IV and a 1Ds Mk III. If a 1D Mk IV can't do it, it likely can't be done.
IMHO. as always, of course.