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DPChallenge Forums >> Hardware and Software >> Canon 7D Mk II Sensor Performance
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Showing posts 1 - 8 of 8, (reverse)
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 12/02/2014 06:36:27 PM · #1
A very in-depth review of sensor performance here, published by one of the most knowledgeable sources around on this matter, Roger Clark. Some eye-popping stats in there, all in all a tremendously good showing by this sensor.
 12/02/2014 07:05:07 PM · #2
Planning on reading it, but doesn't it seem a bit disingenuous to start with an astrophotography picture that is 70 1 minute exposures averaged out? That has much less to do with the sensor and more to do with the processing. I have a friend who does serious astrophotography and he uses his iphone sensor.
 12/02/2014 07:12:19 PM · #3
Originally posted by DrAchoo:
...doesn't it seem a bit disingenuous to start with an astrophotography picture that is 70 1 minute exposures averaged out?


No, not at all! The thing is, he used *no* dark frames, no flat frames, none of the typical astrophotography bag of tricks. Just acquired, averaged, stretched, done. An image acquired/processed in this manner on my 5D classic would be a royal mess. Even the 6D would not fare as well. The 7D Mk II has (by far) the lowest thermal noise of any Canon sensor, and nearly nonexistent pattern noise.
 12/02/2014 07:51:59 PM · #4
I hear ya, but "averaged" in itself goes a long way to cut down noise. Still, my 5D2 is getting long in the tooth and since I don't shoot as much as I used to and I actually shoot sports as much as anything, I'd give serious thought to going the 7D2 rout rather than a 5D3 or waiting for a 5D4.
 12/03/2014 11:55:19 AM · #5
Originally posted by DrAchoo:
I hear ya, but "averaged" in itself goes a long way to cut down noise. Still, my 5D2 is getting long in the tooth and since I don't shoot as much as I used to and I actually shoot sports as much as anything, I'd give serious thought to going the 7D2 rout rather than a 5D3 or waiting for a 5D4.


Indeed it would seem attractive for sports, at least with very good glass. Roger does make the point that the very high pixel density of the 7D II sensor requires *very* good glass to avoid soft results... but again, he is testing on the most difficult of applications, astrophotography, and he is a *stickler* for quality.
Personally, I am not going back to APS-C, but I shoot no sports at all. I am loving the 6D, which is now the *second-best* Canon sensor for low light performance, LOL.
 12/03/2014 12:15:51 PM · #6
DxO was far less impressed with this camera and ranked the sensor below even some micro four thirds models. Low ISO noise performance in particular was considered below par.
 12/03/2014 01:02:15 PM · #7
Originally posted by scalvert:
DxO was far less impressed with this camera and ranked the sensor below even some micro four thirds models. Low ISO noise performance in particular was considered below par.


The smaller the pixels, the higher the low-ISO "noise" due to photon statistics. The only way around this is to implement some NR in the imaging pipeline prior to recording the RAW values. Canon cameras produce a "clean" RAW file, free of most if not all of this tinkering. The end result is that more "noise" may be visible. I trust Roger's analysis, as it gets to the root of sensor performance. The DXO analysis is still of value, however, as it does reflect mainstream conditions of use, whereas Roger's analysis focuses on low-light performance.
For low-ISO work, e.g. landscape, I'll take my 35mm sensor all day long. I found it quite surprising, however, that the 7D II actually bests the 6D in very low light due to the extremely low read noise.
 12/03/2014 01:34:54 PM · #8
I have several friends over on the Canon side still. Several tried the camera with their 400MM F2.8 and 300MM F2.8 shooting pro and college sporting events. All but one sent them back for focusing issues. The last one sent it to Canon in hopes of them being able to fix it.
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