I have a Soligor 85-205mm f/3.8 macro that I'm mounting to my Olympus OM-1n. I've heard decent things about the lens and this one is in really good shape, but I can never get enough light to use it. On a bright sunny day, 400 speed film (fastest I can get under $20 a roll), maximum aperture, set at 85mm, with a full second of exposure - the light meter needle is sitting at rock bottom and photos will come out horrifically underexposed. The meter works great on my other lenses. Is this something I should expect from this lens or is something else weird going on with it? Thanks.