Bingley
Veteran
It would be nice to see some photos of people taken under varying conditions, particularly at varying apertures at and around f2 to f4. I know it's all the rage now to shoot everything wide open, but I often prefer lenses like this -- ones that have quite a bit of focus shift and uncorrected abberations wide open -- stopped down just a bit to clean up some of the inherent softness so the in focus areas are a bit sharper and better delineated from the OOF areas. Not suggesting it for everyone -- just personal preference for portraits and fashion type stuff on occasion.
Although I’m not primarily a portrait photographer, I completely agree with Bruce on this point. I rarely shoot fast lenses wide open, even when I do make portraits, because I want just a bit more depth of field and sharpness that comes from stopping down a bit. Although I don’t have the Skyllaney Bertele Sonnar (ahem… yet), the thought applies to other Sonnar-formula lenses, like the Canon 50/1.5:
These two photos were made at f4.0:

