I am currently shooting a 4x5 Shen Hao with the 90mm grandagon and 210mm g-claron lens...I am selling the grandagon as I do not have much use for the wide angle lens and am intersted in purchasing a 400mm tele lens. The Shen Hao has a 12" rail and I cannot go longer than a 300mm lens. However, with the tele lens, I can go up to 400mm and this would be ideal as I am looking for a longer lens.
Has anyone used the Fuji Tele 400m f/8 or Schneider APO-Tele-Xenar 400 f/5.6? Has anyone done any testing on resolution, sharpness, or contrast--if so, what are your findings?
Thanks in advance.