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Message: <blockquote data-quote="Stoshowicz" data-source="post: 426911" data-attributes="member: 31397"><p>Yep I agree, sensor efficiencies vary , and yes the tradeoff is photons per unit resolution. But I'm not sure I agree on the complete lens use thing, the aperture made smaller to achieve dof , is cancelling out much of the potential light supplied to the sensor per unit area anyway. So if the lens has a max of F1 and you use it at f22 , its the same as using an f5.6 at f22 , isnt it?  The amount of illumination per unit area is the same so regardless of how big or small that area is, just for the small sensor , with the pixels jammed together less actual magnification is needed and you get the greater DOF.</p></blockquote><p></p>