Interested in the observations of other photographers on the performance of the Rodenstock 23mm wideangle lens. Using on a Arca RM3di body with an IQ180 back I like the wide angle aspect but have found 2 main drawbacks to using this lens. Firstly, it is extremely prone to flare - a scene that includes a forest canopy with gaps through which light from clouds appears will invariably produce blue halos around these highlights on the image. See this image for an example of the flare, in this case controlled to some degree by fairly extreme highlight recovery.
And secondly, the lens is very distorted and soft at the corners with a close focussed subject.
Anyone else with similar experiences?