Re: More About the EOS 5DS & EOS 5DS R
V8Beast said:
jrista said:
But once again...utter silence about read noise and dynamic range. This is, clearly, a Low ISO part from Canon. If they had resolved their low ISO read noise issues...one would think they would be proclaiming it to the heavens. Why the silence? :\
Probably because Canon hasn't officially announced anything yet

Other than a small percentage of forum dwellers, if Canon bragged about reduced read noise, who would even understand what they're talking about?
That said, I too find it a bit peculiar that everyone is so seduced by the megapixel count of this machine that the whole DR issue has flown under the radar thus far. I didn't think we'd ever see that day on Canon Rumors ;D
Hell, both dilbert
and psolberg responded in the other thread, and the discussion still hasn't devolved into a DR pissing match
I think the notion that what, over 90% of Canon users DON'T understand, at the very least, that more
tttmnbso* is better, is a gravely mistaken notion. Canon doesn't have to use the term "read noise", all they have to do is say that they have "Significantly improved low ISO dynamic range", and EVERYONE will know what they are talking about. People don't even have to actually know what
tttmnbso* is. But a significant number of the types of people who actually do buy "higher end" DSLRs, like the 5D III, D810, 1D X, D4, A7r/s, etc. are going to know at the very least that "more
tttmnbso* is better", and many are also going to know what
tttmnbso* actually is. These are pro-grade cameras were talking about, not your consumer-grade rebel.
I use the term read noise because
that, specifically, is what's holding Canon's
tttmnbso* back. Plus, I know most regular people here, because of the endless petty wars, (and hopefully because of some of my past posts on the topic of read noise specifically), know what read noise is as well.

There are other things that can be done to improve
tttmnbso*, but Canon is already doing them. Bigger pixels, less dark current, etc. They need to reduce their read noise, and they will immediately start realizing the benefits of it. (And I don't just mean shadow benefits...noise is additive:
Code:
SNR = S/SQRT(S + D + R^2)
Where S = signal, D = dark current, and R = read noise. Reduced SNR affects the entire signal.) But from a marketing standpoint, Canon just has to say "Improved dynamic range", and people will generally understand. Even those who don't actually know what it is, and only know that "more
tttmnbso* is better".
Anyway, not here to start a war (although I'm sure there are a few who just won't be able to resist trying to start one off this post). All I'm here to say is, I think people are smarter than a certain forum group is willing to give them credit for, particularly the types that are buying big high end cameras like the 5D series.
Personally, I'm VERY glad to hear Canon has created a new line of camera that is, at least supposedly, going to focus on LOW ISO performance. That's the first somewhat exciting news I've heard from Canon in...a very long time now. (I was really hoping this announcement would involve their BSI layered sensor technology...but, sounds like not. If it had...I'd have been quite excited.) The 7D II has made a bit of news in the astro world...but testing is already starting to show that the NX1 could very well best it in that arena as well (read noise on the NX1 may be as low as 0.9e- at ISO 1600...which would mean it has the lowest read noise of any current camera on the market, even lower than Exmor...

), but the A7s is quickly shaping up to be one of the biggest light-sucking fiends we've ever seen.
Still, I am glad to hear that Canon has at least shifted some resources to focus on the low ISO end of the spectrum, after some eight years or so focusing pretty exclusively on the high ISO and action end of the spectrum. I just hope they have done the ONE SINGLE thing that will actually improve their low ISO performance: reduce read noise. They have already done everything else. The 7D has 59% Q.E....I don't expect the 5Ds cameras to come in at 41-49% again. They already have the phenomenal focus and metering system (iTR). They already have very good CDS. They already have some of the lowest dark current in the industry. They have already addressed everything else...so that leaves read noise. If they don't do something about that, then it doesn't matter how much Canon improves color purity or how much they limit high ISO settings...they still won't stand a chance against the D810 or any of the MFD cameras using Sony's 50mp MF sensor. As this is a studio camera...I'll be dumbfounded if they don't...but...faith waned a long time ago. :-\
* TTTMNBSO: The term that must not be spoken of
