Hi, I'm looking for a used lens in the 240 mm range. I have been offered the following three lenses: 240 5.6 Sironar (condition B) 240 5.6 Symmar – S MC (condition A/B) 240 5.6 MC Sinaron S (condition B) All three lenses are mounted in a Sinar Lens board prepared for the behind-the-lens-shutter, so they fit my Sinar P. They should cover the 5x7 format. The first two are about the same price, the third one costs about the double. I’m inclined to buy the second done, since it has a good price and is in the best condition. What would your suggestions be? Is the Sinaron S really worth the double price? Thanks for helpful advices. May the light be with you, Miha.