I understand the principle of how individual cells in a barrel need to remain constant for the barrel lens to retain the same focus. However, I periodically see some ebay sellers take the glass cells out of a brass barrel lens. This raises a flag of concern for me. How confident should I be that lens which have been removed and reinstalled in a brass barrel has had its cells properly reinstalled? Or in other words, is it necessary for the glass in old brass lenses, e.g., Voightlander or Dallmeyer barrel lens, which have been removed be reinstalled in the barrel precisely for the lens to work as designed? Is the alignment of lenses critical in the old brass barrel lens?
Jon
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