Have there been any comparisons made say between the Leupold Cascade (8x42) Porro and the other 6X+ bins like the Yosemite, Raven, and Raptor?
Depth of Field or Depth of Focus?
The depth of field difference between the 8x42 Cascade porro and the 6x bins like the Yosemite, Raven, etc... is fairly noticeable and should be substantially different (favoring the 6x) simply because of the difference in magnification.
The term depth of focus is something I have not really seen used except here on Birdforum (I am giving Steve C. credit as I believe he was the first to coin the term). The depth of focus on the Cascades is very good simply because of the moderate-slow focusing speed, the porro design and the excellent apparent depth of field for an 8x binocular. The depth of focus on the 8x Cascade is very good in my opinion and entirely similar with the 6.5x Raven I just compared it to.