conradyiu
closer
Dear all,
Looking for Canon 35/2 lens and wonder what is the difference between type I and II. Any advice?
Looking for Canon 35/2 lens and wonder what is the difference between type I and II. Any advice?
Sonnar2 said:I've seen these diahrams at photo.net before but it looks to me that the second design will not work and it's probably wrong (first element too strong power biconvex lens). I haven't worked it through a ray tracing program but usually first elements of a Gaussian type needs to be convexo-concave.
ferider said:I don't know. I know my sample had weird bokeh and other Canon 35/2 users are very happy with theirs. I always thought that they might be referring to v2.
ferider said:Interesting ... it doesn't look completely spherical either.
But then, the 37/1.7 Ultron front element is not convexo-concave, either ...
Sonnar2 said:This (Canon 35/2.0) isn't a lens to use wide open if possible, but very strong from f/4 onwards and has still a great ratio performance : size (weight). A strong buy for a backpacker, traveller lens in screwmount. And just in case you urgently need it, you can use it at f/2.