i would love any clarification anyone might be able to provide on this...
i am interested in purchasing a longer lens for 4x5 than i currently own. at the moment, it is a toss up between a ross homocentric 12"/8 in an inoperable volute shutter and an emil busch cooke-telar 13"/7 barrel lens. in my research on both of these lenses, i have found conflicting coverage info on the telar. one site says it will cover 4x5 and 5x7. another says that when the aperture is wide open, it will only cover 2 1/4 x 3 1/4 (http://www.allenrumme.com/lensdb/Telephoto.html). i figure one source is speaking of worst case scenario and the other speaks of best case possible.
in addition, i am concerned about the volute shutter. i know these shutters are unique in their design. will the lens be useless due to the nature of the inoperable shutter?
so as to avoid confusion, bellows extension is not a concern. and as far as i have read, both lenses will fit on linhof sized boards. but i would love confirmation on this point.
any additional info or clarification would be appreciated.