Great Video Explanation of 7Dii low DXO scores
- Thread starter bmwzimmer
- Start date
we have our new ken rockwell.. do everything to get some clicks.
first he said he switches to nikon and canon cameras are good enough for amateurs.... now this.
same as rockwell, every week a differnet camera is his favourite to photograph his kids..... :
DXO is all about noise.... to get a good insight view read the luminous landscape article about how DXO measures.
first he said he switches to nikon and canon cameras are good enough for amateurs.... now this.
same as rockwell, every week a differnet camera is his favourite to photograph his kids..... :
DXO is all about noise.... to get a good insight view read the luminous landscape article about how DXO measures.
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Look, there are very few of these online photography experts that I give total respect to and Mr Northrup has put his foot in it a good few times already.
However, I do like the gist of this video.
I'm sure some would question his math or his logic but there's a realistic balance to this video that I appreciate.
I feel like I know the truths about the 7Dii a lot better and you know what? I'm comfortable with that. Tony has balanced the raw measurements as offered by DxO with some common sense.
For the record, my go-to guy for gear reviews is Brian over at TDP.
However, I do like the gist of this video.
I'm sure some would question his math or his logic but there's a realistic balance to this video that I appreciate.
I feel like I know the truths about the 7Dii a lot better and you know what? I'm comfortable with that. Tony has balanced the raw measurements as offered by DxO with some common sense.
For the record, my go-to guy for gear reviews is Brian over at TDP.
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MichaelHodges said:
That's been the problem all along with DXO. While their three individual metrics are very insightful, how DXO weighs these metrics against each other to arrive at a single score is one giant mystery. And people are willing to riot over that single overall sensor score
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V8Beast said:MichaelHodges said:
That's been the problem all along with DXO. While their three individual metrics are very insightful, how DXO weighs these metrics against each other to arrive at a single score is one giant mystery. And people are willing to riot over that single overall sensor score
The Zeiss 24-70 f4 just bested the Canon and Nikon versions, despite the fact that the Nikon outscored the Zeiss in each metric the Zeiss still got an overall score one more than the Nikon.
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MichaelHodges said:
Only for lower ISO dynamic range. (of course that can be quite important for some shots)
Not for say shooting at ISO4000. The 7D2 does better than any 4/3rds there.
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privatebydesign said:V8Beast said:MichaelHodges said:
That's been the problem all along with DXO. While their three individual metrics are very insightful, how DXO weighs these metrics against each other to arrive at a single score is one giant mystery. And people are willing to riot over that single overall sensor score
The Zeiss 24-70 f4 just bested the Canon and Nikon versions, despite the fact that the Nikon outscored the Zeiss in each metric the Zeiss still got an overall score one more than the Nikon.
Can you sme-e-ellllll what the DXO is cooking? Or is that smoking?
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LetTheRightLensIn said:
I was just looking at the raw SNR charts for the 7d2 vs EM10 on DxOmark - looks like the little MFT Oly is a match or win over most of the chart from base to top ISO. The Oly's a bit less colorblind too.
EDIT: so the DR plots I'm seeing are a little puzzling considering the SNR chart /edit
Still, I'm getting a 7d2 for the AF system which will undoubtedly blow the Oly into the weeds for anything requiring fast focus with long lenses.
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bmwzimmer said:
overall it was generally reasonable advice and all
although maybe still a little bit off on a few things here and there throughout and it wasn't really all quite right, but it was a decent try and generally nothing too outrageous which is better than most who comment on blogs or the fanboy posts manage
(it would be better to compare percentages based on SNR plot rather than the ISO score as the ISO score factors in stuff like metamerism and color sensitivity in addition to luminance SNR; OTOH since the color sensitivity and noise and metamerism become worse when you cheat the CFA array, using the ISO score maybe overall gives you a better hint at the actual efficiency of the tech itself and he did seem to be going into that a lot, but then he was also talking about it as if it would give the same visual impression as the SNR plot, which isn't really quite true; and when he said Canon was almost caught up to Nikon for sensors he forgot to bring in that they are still far, far behind for lower ISO DR during that section of the video; also it's a bit confusing, since Canon was basically already there for SNR for the most part and high ISO performance in a practical sense (although it is true that if you penalize them for cheating the color filter array which hurts color quality, but such quality isn't great at high ISO anyway, then they were a bit less efficient, blah blah blah) and he did forget to bring up the banding differences at low ISO, like 7D and D7100 have some at low ISO and D6000 and 7D2 not so much so the 7D2 actually does better for effective DR at ISO100 than the 7D blah blah blah although it's certainly world's behind exmor which is also often relatively banding free and with much less late stage read noise; and so on blah blah blah).
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Aglet said:
Hmm I don't see that at all. The 7D2 plot for SNR is above the OM-10 the entire length ISO100 to the very top. are you sure you plugged in the correct cameras? Even if I use the Screen setting, which you should not do, I still don't see the Oly line above the 7D2 the whole way.
It makes sense, the Oly line is above the 7D2 at the lowest end and then below it at the mid and upper end. That is because Canon has terrible late stage read noise and good early stage read noise. So at low ISO it gets hit by combined late and early stage read noise in the shadows and does poorly, even worse than a 4/3rds camera. But when you go to higher ISO the amp boosts the signal up higher so the part that is still a usable shadow at higher ISO is now boosted past the point where most of the late stage read noise gets applied so that doesn't come into play much and Canon does well for the high ISO DR.
Very likely so.
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Bennymiata
Canon Rumors Premium
A well thought out presentation delivered by someone that actually sounds intelligent and believable.
I really liked that he explained the DXO scores and how he compared different makes in a
very honest way.
I really liked that he explained the DXO scores and how he compared different makes in a
very honest way.
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I won't be watching this video. This guy discredited himself terribly with his video titled, "Crop Factor with ISO & Aperture: How Sony, Olympus, Panasonic, Canon, Nikon & Fuji Cheat You".
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