Here is a corner crop 100% from one of the few test images. The fog starts to reduce scene contrast quite heavily (one of the last frames before I aborted the test sequence). Still lens quality and the way it copes with the point light sources come through. No visible coma and only the very mildest vestiges of lateral CA if the frame is scrutinised at high magnification. Some pincushion distortion is visible at 200 mm, though, but few scenes would necessitate any correction.
A 13 sec exposure with the Df, using the Sachtler ENG 2 CF HD as support. The tripod mount for once is adequate. Not perfect, but still better than what most Nikkors of recent lineage have exhibited.
