i am looking into getting a wide angle lense for 4x5 use and i am coming fron the world of 35mm. I assumed that the shorter focal length a lense had the wider the angle of view. While comparing 2 used lenses i ran into something unexpected, The two lenses were a rodenstock grandagon n 65mm f4.5 and a schneider super angulon 90mm f5.6. The rodenstock specs show that thi slense has an image circle of 170mm at f22 and an angle of view of 105 deg. at f22. the schneider specs show the 90mm f5.6 super angulon(not XL) to have an image circle of 235mm at f22 and an angle of view of 105 deg at f22.
I dont understand, wouldn't the 65mm rodenstock need a wider angle of view to cover the same format, isee that the image circle is a bit bigger on the schneider so that could explain a little bit of the difference. A quick look at the schneider specs for their super angulon series of lenses shows that the 47mm and 38mm super angulon XL's have the same angle of view (120) and that the 72mm has only 5 degrees less view at 115. I thought that the term wide angle reffered to the increased angle of view. Why would someone choose a shorter focal length lense with the same angle of view as a slightly longer lense, especially since the shorter lense should exhibit more drop off near the edges? Thanks in advance, ifeel so stupid when it comes to this stuff and you guys are always great. Any comments about the two lenses mentioned first as far as which one might be a better choice for architecture kind of stuff would be great, ease of focusing is a concern and it seems that the 90mm schneider should have the advantage, less need for a center filter and a smaller hot spot on the ground glass should make up for the one stop the rodenstock f4.5 has as an advantage?