Did I buy a large format macro lens? What magnification can I expect from it? How can I adapt it to my 35mm camera? Last week I asked the question "Can I use large format lenses on the 35mm camera?" I got several well expressed responses that summarize to "you can, but there's no good reason to." I excepted that and moved on. After all, why spend my money on a configuration that will not get me any benefit? Yesterday, I had time to kill between appointments and stopped at a garage sale. For one dollar I bought a lens that I think is a large format lens. But, having never used large format equipment I have no experience to compare against. Hopefully, someone can confirm (or refute) my assumption. The lens has a threaded mount about 33mm in diameter and is about 35mm long. The legend printed around the lens is "BAUSCH & LOMB Rochester, N.Y., U.S.A. 158mm f/6.3 MACRO". The body of the lens is silver. The aperture is controled by a ring and is marked from f/6.3 to f/45. Using google I could find no reference to this lens. On ebay there is an auction for a similar lens (Item number: 300101197116) at http://cgi.ebay.com/Brass-Lens-1-6-3-f-158mm-Tessar-IIb-Bausch-Lomb_W0QQitemZ300101197116QQihZ020QQcategoryZ4702QQrdZ1QQssPageNameZWD1VQQcmdZViewItem The only cosmetic differences I see between the auction lens and mine is: The legend on the auction lens is different. It includes "Tessar IIb" and does not include "MACRO". The auction lens is black, mine is silver. Is there an adapter to mount this lens on my 35mm camera? Perhaps from the thread mount on this lens to a t-mount. Thank You, Tim Corio
