I have several specific questions, regarding large format lenses used with 6x7cm film format. I am interested in purchasing a large format lens in the 120mm-15 0mm focal length range, but I have a couple of issues to work out first. I reall y want to achieve the highest overall image quality possible from the relatively small 6x7 film size. I'm aware that the maximum resolution available on many large format lenses, is considerably less than that available on medium format l enses. Therefore when using a large format lens for the 6x7cm film format, the resulting image may not equal the overall image quality obtained by using a trad itional medium format camera and lens combination. For this reason I believe th at I should start out with a very high-resolution large format lens. I've been told that usi ng a lens with a very large image circle, for a given film size will reduce the overall contrast of the image. Most manufactures offer at least two lenses for a given focal length, usually one is said to be an improved " in some form " ver sion of a basic model. When I look at the specifications for these upper end len s, more often than not, the image circle is larger on these improved versions. C an you folks provide some insight regarding these issues. At this point this is all academic to me, because I have no personal experi ence with any of this. What I really need is some sound advice on purchasing a h igh quality large format lens in the 120-150mm focal length range to use on my A rca-Swiss 6x9 F-line camera. Do you think that it's possible while using the Arca 6x9 with a 6x7 film back to equal the image quality of a traditional medium format 6x6 image croppe d down to 6x4.5? One more important question, do you think I would be better off using the full 6x9 format and then cropping to 6x8 rather than using the 6x7 format? I prefer the traditional aspe ct ratio of 1:1.25 i.e. 4x5, 8x10, etc. If you could make brand and model specific lens recommendations that would be very helpful. Thanks a lot.
Bob Pellegrino
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