But 7D users want a higher pixel density eg 32mp so the bus speed is the same as for a 32mp full frame sensor. I get the impression that providing 20mp in a APS-C sensor would be underwhelming for the potential buyers. There would be a reduced cost for wafer space but estimating the $$ difference would be hard and even harder to estimate how that would compare to retail pricing.The main advantage I see in APSC for mirrorless is simply cost. A smaller sensor that needs to be able transfer less information per second must surely cost less, plus it gives Canon the ability to stratify prices, something we all know Canon is super duper at doing.
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