In the course of searching for a reasonably priced used lens for an 8x10, I came across a 305 6.3 Caltar-Ilex. Can Anybody tell me a little more about this mode ls pedigree, image circle and other specs. These days the Caltars come from eith er Rodenstock or Schneider. This one looks suspiciously like a Commercial Ektar. It's in mint condition and priced at 300 dollars. So if it is an Ektar, it's a bargain. I'm looking to use it, not collect it, so the brand name means nothing.