You have a really interesting and unique hobby! Where do you find these lenses? I suppose that you are using them in your professional life, but that's a really big collection!
I have picked this post on behalf of the @OurPick project which will be highlighted in the next post!
Also from online sales sites in my country.
In my medical profession, I used them a lot. Now I enjoy them as collector's items. They treasure a great history, longevity and that to me brings them great value.
Thank you for writingHi @ph1102. These are lenses I have acquired over the years, from people who sold their equipment, accessories and parts.