Nils Olof, thank you for pointing out the Suiter's article.
To me, it means that far away, thick spider is no more destructive than a hairline spider. My question relates to how destructive it would be closer to Airy disk.
Speaking of that model, at which spider thickness would his model of sqaring the energy would completely suck everything out of Airy disk?
I've read at Vladimir Sacek's site that it's not the same modeling that can be used for spiders and larger obstructions and that is logical to me...
Also, Sacek mentioned that a spider vane that is D/100 will shoot 100 Airy disk diameters away (with some meaningful significance of energy, I take it,or maybe it's the first lobe).
If my single stalk is 1/5th aperture thick, shouldn't it's significant influence spread to 5 Airy disk diameters, or some such number (and let it taper down to equal energy of a hairline spider, I don't mind)?
In another direction, my CO+stalk would cover 60% of aperture and effectively reduce it to 40%.
So, what happens in that case?