an experiment with a selfmade quartz lens...
No special sharpening applied, only to compensate for resizing a little bit.It’s the bg swirl!
Was it sharpened?
I am wondering how it would look untouched by edge enhancement!
Yes, that's the one I selected, exactly because of that - it is balanced for me.It looks like you chose the second of the examples you referenced. I like that balance as one doesn’t want the bg too harsh or too soft!
BRW, “contra lucem” is a term more associated with ecclestiastical debate in Latin. So you mean “back lit” it do you mean “reflected light” or what.
Is this more of a poetic term, or commonly used in academic Spectral investigations with biological samples?