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Does the A7s' high-ISO capability effectively negate the dof advantage I’d otherwise get by choosing a Micro 4/3 camera? (Assuming I’m trying to achieve maximum dof.) In other words, shouldn't I be able to match even the deepest dof I could get with an m4/3, just by stopping-down and boosting the ISO…and of course changing the lens to match perspective, etc? Here's the thing: I'm bumping up from teeny-chip camcorders with 10x (yes, that’s double-digits) crop factors, and from this point-of-view, and in light of the A7s, the dof advantage of a 2x crop vs. FF seems almost non-existent. I’m wondering if I shouldn't skip over the m4/3 sensors and go with the A7s. (I’m usually in low-light, high-contrast environments, so the appeal of the A7s on other fronts is obvious.) There are a boatload of questions about the still-unreleased A7s, but in terms of dof, does my thinking make sense? Thanks.
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http://lenses.zeiss.com/content/dam/Photography/new/pdf/en/cine/master_anamorphic/master_anamorphic_depth_of_field_tables_meter.pdf
