Full review will be coming in the next few weeks. This is my continued analysis of the lens in daily use.
This may be the perfect lens for female portraits. (I say female here, as I like male portraits to show more detail in the hair and skin pores and like just a bit of softness to female portraits.) The above photo of my baby girl was taken with overcast skies, mid-day. This was wide open at 1.5 @ 1/4000 second ISO 160. This image is SOOC other than conversion to jpg from RAW. The photo below had some minor edits to bring out the shadows a bit. The sun (behind thin clouds) was over her right shoulder, high in the sky. Again, the edits here are very minor and almost not worth mentioning. Color was not touched in either photo.
As you can (hopefully) see from the above two images, portraits come out with a gorgeous warmth and just the right sharpness, wide open. Like I said in the previous post, the Sonnar is optimized for f/1.5, so the sharpness is dead on. Below, I went to f/2 and because of the floating element, the focus "shifts" and is just slightly off. By knowing just how much it shifts, you can adjust your focus and get them dead on. I prefer to shoot this lens at either f/1.5 where it's 100% accurate or jump it up to f/5.6 where it's once again more forgiving.
Finally, I wanted to highlight the infamous purple fringe below. It seems like f/2 shows this the most (I don't get it at f/1.5). This is an unedited image so I could show you exactly what happens with a bright white shirt. Yes, you can either shoot it (right) in camera, or fix in post. I didn't bring the Summilux with me on this shoot, so no compare this time.