What is a R.S. lens?

[svlindbe]

I was looking at information about the Wollensak Voltas lenses. I was at this webpage:

http://www.cameraeccentric.com/html/info/wollensak_1.html

See the picture of page 20 from the old brochure. I read this: "It is hoped that the Voltas will not be confused with the ordinary R.R or R.S. type of lenses, ... "

R.R. stands for Rapid Rectilinear, but what is a R.S. lens?

Svein Lindberg

[jnantz]

I was looking at information about the Wollensak Voltas lenses. I was at this webpage:

http://www.cameraeccentric.com/html/info/wollensak_1.html

See the picture of page 20 from the old brochure. I read this: "It is hoped that the Voltas will not be confused with the ordinary R.R or R.S. type of lenses, ... "

R.R. stands for Rapid Rectilinear, but what is a R.S. lens?

Svein Lindberg

maybe the "RS" stands for Rapid Symmetrical ...

http://www.archive.org/stream/completeselfinst10schriala/completeselfinst10schriala_djvu.txt


A rapid rectilinear lens, the two combinations of which are
of the same focal length and of identical construction.

[Ole Tjugen]

maybe the "RS" stands for Rapid Symmetrical ?

so it does.