Archived posting to the Leica Users Group, 2008/03/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]John, I'm affraid to think that I can do such experiments!, I'm not able for this, I'm a simply user, Thanks for the interesting information Saludos cordiales Luis -----Mensaje original----- De: lug-bounces+luisripoll=telefonica.net@leica-users.org [mailto:lug-bounces+luisripoll=telefonica.net@leica-users.org] En nombre de John Collier Enviado el: martes, 18 de marzo de 2008 1:18 Para: Leica Users Group Asunto: Re: [Leica] Questions about the visoflex III I have a friend who adapted his black 65 mm Elmars to a Nikon tilt/ shift bellows. Apparently the image circle is not that big and you can't shift or tilt very much at all. He also had a hell of a time with paint flecks from the diaphragm blades and has learned to quickly field strip and clean the lens. John On 17-Mar-08, at 6:22 PM, ferrel anderson wrote: > I regard to the two versions of the 65 mm Elmar lenses, I offer the > following comments. The earlier chrome version is a low contrast > lens that achieves excellent resolution of 80 lpm at only f8. > Color pictures show a pastel rendition, that can be wonderful if that > is what you want. The black version is a high contrast lens of much > higher resolution. These comments are based on actual picture results > with B&W and color slide films. The resolution results were on B&W > film taken of resolution test targets at the conventional 26 focal > length distance. Neither lens achieved excellent resolution at the > edges, but at macro distances where the center of the lens is used to > project the picture results, the resolution is excellent across the > field. In comparison shots taken at the reproduction ratio of 1:5 > with the 60 mm Macro Elmarit R and the 100 mm APO macro Elmarit R > lenses with Kodachrome, the results were indistinguishable. When I > work with the Bellows R, the two lenses that I use without hesitation > are the black 65 mm Elmar and 100 mm Macro Elmar. If I want to use > macro lenses as universal lenses, I choose the 60 mm Macro Elmarit R > and 100 mm APO Macro Elmarit R lenses. They are both superb, from the > center to the corner of the picture and at all distances. > > I should add, that in resolution tests taken with the much Lamented > Kodak Technical Pan film, the 60 and 100 mm R lenses run circles > around the other lenses discussed above. The great leveler though are > the films that are most commonly used where maximum resolution is from > 80 to 100 lines per millimeter. All of these lenses, except the > chrome 65 mm Elmar, at optimum aperture out-resolve these films. _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information