Misconception re: frame lines, DOF, compression

[CCM22]

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3 hours ago, kiwidad said:

I'll leave it this thought... If  I enlarge a print do I reduce perceived depth of filed?

Yes (that was what I initially failed to grasp when the equivalent aperture was discussed).

I actually “knew” this intuitively when checking if I nailed focus after taking a picture: when I look at the thumbnail almost everything is within the depth of field, so I “knew” I needed to zoom in/enlarge it to something resembling the final output size (either iPhone screen, or full screen) to see if I actually nailed focus and the eye (or whatever I was aiming for) actually was within the acceptable focus depth of field for that particular output size.