AhamB,
Clearly - most of these pictures were taken in the first two days of owning the lens, where good pictures take a back seat to figuring out how to "break" the lens. The street shots were to see if I could get away with using big long throw lens for that type of shooting; I've had better success shooting faster and longer lenses, hence the experience in OOF borders - this will stay a portrait lens. Funny enough, most of my sharp shots are scale focused by estimation, rather than with the viewfinder.
Athena on my windowsill (where she likes to sit and watch the city go by) is a typical backlighting test, intended to test the resilience against CA and to give me an idea of the latitude a lens offers. I can also take the shot from my desk.
I've done this with a number of fast teles - just the other day, I shot off -
85/1.9 Sup Tak
110/2.8 Mamiya
150/3.5 Mamiya
90/3.5 Kilar
105/2.8 S-M-C Tak
105/2DC Nikkor
75-150/3.5 Series E
40-80/3.5 C/Y Zeiss
-and the 80/1.9N. Nothing has the problems the 80/1.9 has. Some can have fringing under known circumstances (85/1.9 Tak and 105/2DC, I'm looking at you). What is curious to me is the minimal color issues in "Athena_Perfectly_Fine" vs "Athena_Purple_Fringed," and others. Clearly high contrast situations are dangerous, and there is an issue with apochromaticity, especially out of the subject plane. However by all rights, that image ("Pefectly Fine") should show more issues, having plenty of light dark high contrast edges including those outside of the subject plane.
My big issue is this - as a portrait lens, whether with white backdrops, or a strong flash to illumiate deep black skin (thinking about Anton Corbijn's Miles Davis photo here) contrast, especially in borders, especially on OOF regions is a common need in subject isolation. I find this lens, whether by design or by sample, to be distinctly bad at this.
Finally, the Infinity_Focus_Halo doesn't overexpose (I just checked the historgram). To be sure, it was under contrasty light and wide open, but there you go.
It just seems to me that this lens needs way too much hand holding. I've used my 105/2 as a street lens and it is doable. The 80/1.9N... ? I'm not getting rid of it just yet - it can turn out some wonderful images - but it is nigh useless outside of a controlled environment and I am very disappointed with the CA issues.