TTArtisans 50mm F 2.0 Lens - Full Frame Disappointment

Bad Morning, Bad Lens: It was cold, windy, and a little moist. It was also the first and last time I'll use this lens. Touted as a "wunderlens" for its price, its performance was less than satisfactory. First, the vignetting was beyond what I would accept as artistic. Next, the degree of  smearing (a.k.a. coma)  of specular highlights (streetlights) was so unexpected, and so disappointing. 

I will admit it was a nice attempt at producing a full-frame, manually focused lens at this price point. I got the performance that I paid for, which wasn't much by any measure. Pity though, as I thought it was a nice lens.

Until I used. it.