I’ve owned several RDA’s including a 12”, 14”, 16.5” and 19”. I owned and used them in studio and in the field for several decades. Currently I only own a 14” that was factory mounted in an Ilex shutter. RDA’s we’re specifically designed as a process lens for high resolution flat field copy work and color separations on a process camera but they perform quite well at infinity. About fifteen years ago I owned a Schneider 14” Gold Dot Dagor and did a comparison on 8x10. I was unable to see any difference with shots made in the field and the RD covered with plenty of movements stopped down. I wound up selling the Dagor and still have the RD that I have had since the 70’s. They are excellent all round lenses.