Sorry about my previous message that looked like garbage. Here is a more readable version. <br /> <br /> Mike Johnston said: <br /> <br /> <br /> It certainly agrees with my anecdotal evidence. I once brought home from the store five brand-new lenses--an El-Nikkor 50/2.8, a Schneider Apo-Componon-S 45mm, a Componon-S 50/2.8, a Rodagon 50/2.8, and an Apo-Rodagon-N 50/2.8--and tested them all directly against each other. The Apo-Rodagon-N was the clear winner, and the Schneider 45mm was so decentered that it was obvious it was flawed even without careful testing. It was the second sample I'd used of that lens and both samples were, in Ctein's terms, "real dogs." <br /> <br /> Mike, <br /> <br /> Can you tell me how you could tell the Schneider was decentered? Are you saying the lens elements were not in line with each other? Or do you meant that the lens was not aligned with the rest of the enlarger? Would the former just be a problem with sample variance or would that be systematic of a whole run of lenses? <br /> <br /> Any other tips on how to check an englarging lens? <br /> <br /> <br /> thanks <br /> <br /> <br /> <br /> dave <br /> <br /> <br /> <br /> <br /> <br /> <br />
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