That was me. I once read an article (which unfortunately I can't find anymore) in which a traditional sensor, a BSI sensor and stacked sensor were compared. In one part of the article the author cited prices from the Sony semiconductor sales department and mentioned that a stacked sensor with the same pixel count (it was 20 or 24mp on all sensors) is 300-500 $ more expansive than a traditional design and 200-400 $ more expansive than a BSI sensor. Of course, the author didn't know if Sony semiconductor department just put a higher mark-up on the stacked sensor or not.Someone here said that the R8 would never get it as it's canons cheap full frame, but I hope that's not the strategy.
Nevertheless, although I don't have exact numbers the production costs of a stacked sensor are higher. I just can´t see Canon putting an expensive sensor in a full-frame entry level camera.
I´ll search for the article later tonight. Hopefully I can find it.
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