Dennis Felty

2-Jul-2001, 00:11

Im interested in purchashing a wide angle lens for 4x5 negatives. Schneider show s the coverage angle as being 105 degrees for the 65mm Super Angelon, 105 degree s for the 75mm Super Angelon and 100 degrees for the 90mm Super Angelon and 100 degrees for the 165mm Super Angelon. Is it correct to conclude that "angle of vi ew" is measured as a factor of the image circle rather than as a factor of the n egative size. As an example if angle of view is determined by image circle then the 75mm Super Angelon with an image circle of 198mm is twice as wide when used with a 4x5 negative as the 165mm Super Angelon with an image circle of 395mm. It appears that lenses of a common design will have a similiar "coverage angle".

So the question is how much wider is a 65mm Super Angelon compared to the 90mm S uper Angelon in terms of image actually recorded on a 4x5 negative? It appears t hat for lenses of a common design, the shortest focal length that produces an im age circle that will cover the negative will produce the widest image on the neg ative.

Is this correct?

So the question is how much wider is a 65mm Super Angelon compared to the 90mm S uper Angelon in terms of image actually recorded on a 4x5 negative? It appears t hat for lenses of a common design, the shortest focal length that produces an im age circle that will cover the negative will produce the widest image on the neg ative.

Is this correct?