I really can't see Canon gimping the 7D II with the same sensor as the 70D. It just wouldn't sell. I think most people expect there to be some differentiation between the XXD and 7D line now, and reusing the sensor would diminish that differentiation. It would deliver on their previous comments to make the 7D II something special, too...and maybe give everyone a glimpse of what we might see in Canon's BigMP offering.I call BS. 7DII will be purchased mostly by people who know what 7DII is and what it offers. They know it will (most probably) offer superior FPS, AF, ergonomics, (dual) CF card, 100% VF and 1x magnification, advanced fuctions, etc etc etc, not to mention I am pretty sure it will have Digic6 processor, which is said to even further improve noise performance up to 6400 ISO point, and probably image quality. 70D with 20.2MP and Digic5+ vs 7DII 20.2MP and (Dual?) Digic6(+) processor. It has got to have better ISO and IQ, doesnt matter if its the same MP count.
And since when did people transfer from "MP doesnt count" to "MP is #1 priority"?
My comment wasn't as much about MP count as it was about the "revolutionary" nature of whatever sensor the 7D II gets. Canon clearly stated a couple of times that they were going to do something great with the 7D II sensor. My point, really, was that if the 7D II gets THE SAME SENSOR
as the 70D, then Canon will just be doing the same old thing...AGAIN
the SAME OLD SENSOR
. I think the extensive reuse of their 18mp sensor, even in tweaked forms that have FP-PDAF, has soured a lot of people's expectations. I think it would be negative for PR for a lot of people if Canon did not introduce some kind of new sensor in the 7D II.
Given that the only other rumored sensor is a 24mp sensor...well, I mentioned a 24mp sensor in my last answer. I do think it needs to be different, not only in design, but megapixel count. It could be a 19mp sensor, or a 21mp sensor...although given that the 7D line has always been strongly correlated with reach, I think higher IS better in this context (especially given the 24mp APS-C sensors of the competition). I do believe that with a BSI design, a 24mp sensor could be created that performs as well as the 18mp one without any other technological improvements at all. If you throw in the CFA changes of the 5D III and 1D X, and any other improvements that might have hinted about over the last year (i.e. active cooling, a shift to 180nm, on-die image processing (NR, ADC), etc.), and the 7D II sensor even with more megapixels could perform noticeably better than the original 7D.
Fundamentally, though, my point is that the sensor of the 7D II really needs to shine...it needs to be DIFFERENT than the 70D's sensor, and it should really include some innovative technology (even if Canon sticks with a 500nm process.) Personally, I'm getting a bit tired of extensive sensor reuse over a period of years, especially in a high end product like the 7D line. If I am going to spend $2000 or more on such a product, it damn well better be worthy of it.
(Oh, and BTW...I would point out that the dual DIGIC readout of the current 7D is actually the root cause of its banding problems. It gives a higher readout rate, but it also introduces fairly strong vertical banding up into the midtones (above and beyond the crosshatch banding that already exists in the deep shadows). All single-DIGIC cameras that use the same 18mp APS-C sensor actually have BETTER noise characteristics than the 7D. I don't believe the use of DIGIC 6 will alleviate that, assuming Canon continues to take their current approach to off-die ADC.)