"Both" are nice lenses.
Yes, need to do some tests with the Japanese 50mm, it does focus closer, 45cm in stead of 60cm with the RestOfWorld Series 4... lens.
you got exactly the classic brochures coating colours
I often used this lens on the DF
Thanks Thomas, the colours must be part of the coatings of the lens, then
(Takes some trial and error to get them visible, angle of the lens and flash)