Large format lenses tend to not be as sharp as conventional 35mm lenses because they're enlarging a much larger negative & the magnification is not as high. If they made them as sharp as a 35mm lens, the cost to produce them would be incredibly high. You just bought yourself a nice converstion piece! Regards, Bill On Fri, April 20, 2007 8:42 am, Tim Corio said: > 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 > >
