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| p.3 #8 · Canon Files for Dual-Scale Column-Parallel ADC Patent |
Statements like that are quite arrogant and not very helpful.
So you didn't mean one half of the sensor shooting at high ISO and the other half at low ISO?
Or what did I miss?
And I'm not trying to be arrogant or not helpful- but I can't really figure out where you're coming from, though it sounds like you're talking about ML's implementation of dual-ISO, where I'm talking about using it on the '40MP' Canon APS-C sensor in the 70D and the higher-resolution Exmore 24MP and 36MP sensors.
On the Canon DPAF sensor, it makes sense, as you'd still get the full light intensity- you'd just be measuring it in two different ways, for each photo-site. While this is similar to what ML is doing with Dual-ISO, it's different in that there are twice as many photo sites, and it'd be a first-party implementation and not a third-party hack (supposing ML doesn't enable it in the 70D before Canon).
I think that there's real hope there for Canon to augment their lower native per-pixel DR with this method on DPAF sensors by intelligently reading each photo-site half at various ISO speeds, providing greater sensitivity in darker areas, while lowering sensitivity in the highlights, effectively widening the DR, and creating a 'single-shot HDR' style RAW that records far more detail than we've yet seen.
For the Exmor, my only observation is that the resolution is already very high- and it's mostly useless, as neither Sony, nor Nikon, nor Pentax, nor anyone else that ships Exmor-equipped cameras has a robust line of lenses that can truly take advantage of that extra definition. Thus, it would make sense to set up a dual-ISO mode that halves the resolution and uses adjacent photo-sites to build a higher-DR, half-resolution RAW, at 12MP for the cropper and 18MP for the FF. You could guarantee that while you're getting lower output resolution, you'd still be close to the effective resolution of the most popular lenses (aside from the 14-24, and maybe a few primes, especially the Sigmas), but you'd still have a plenty usable image that holds significantly more contrast detail.
I'm not saying that it's feasible, and it does seem that Nikon cameras at least are fairly gimped when it comes to on-body processing compared to Sony and Canon; and Sony doesn't make an FF MILC or DSLR with their top-end sensor, just the SLT A99, so it's not something I'd expect to see soon- though it'd certainly be cool to see it in a next-gen Pentax K-5 III(s) using the 24MP APS-C Exmor.