i do no see any vignetting in the sky...? did you correct it?
- sharp- unsharp looks very smooth for 19mm ( did you use a bit of tilt in the leaves picture..?
No, I didn't correct vignetting at all. I believe that this image was shot with a slight rise, like 2 or 3mm. That was shot at f8 though.
Yes, the leaves image was shot with probably 2-3 degrees of tilt.
Overall the lens seems well behaved. The extreme corners with 10-12 mm of shift do of course show weaker corners when examined at 100%, but it is still pretty good when looking at prints. In the center the image quality seems nearly Otus like.
The lens is easy to use thanks to the independent shift/tilt action (something Canon T/S users have been benefiting from for years), build quality is second to none. The lens cap is great.
The only issue is going to be flare as feared.