I bought a 210mm Sironar-W on fleabay (I know, I know) and tried it today on my Arca Swiss 8x10. The lens focuses (with difficulty) in the middle of the ground glass, but beyond the center everything is blurred. I cannot get anything beyond the center to come into focus at all. Replacing that lens with my regular 210mm APO-Symmar (which barely covers the format) gives me a perfect image on the GG. What would cause the problem I saw with the Sironar-W? Is it misaligned? Damaged? There are no physical signs of damage on the lens.
Bookmarks