Why do Zeiss alpha level binoculars like the FL and SF have some of the best CA control of any binoculars? Zeiss alpha binoculars like the FL and SF have some of the best CA control of any binoculars. Swarovski's have good CA control, but Zeiss FL'and SF's are usually a little better. They must be using similar grades of Schott glass in these alpha level binoculars, so why do Zeiss seem to edge out most of the competition when it comes to CA?
The Zeiss SF 8x32 and SF 10x32 are particularly good at controlling CA because I see almost no CA in the center or on the edge in either of them, and I have never seen that before in the dozens of binoculars that I have tested for CA. I use a similar subjective method of testing for CA that Allbinos uses, so it is not perfect, but it should give you an idea of how well a particular binocular controls CA. Allbinos also agrees that some Zeiss models like the SF 8x32 have the best CA control they have ever seen, so is it the glass or something in the optical design of the binocular, like more ED lenses in the optical train?
From Allbinos
"Also chromatic aberration correction result, one of the best in the whole history of our tests, is achieved despite such a wide field of view. If you don't like CA effects, the Victory SF 8x32 is definitely your pair of binoculars because it fares distinctly better than all binoculars produced by its main rival, Swarovski. Swarovski binoculars have noticeable problems with chromatic aberration on the edge of the field, which is often narrower than the field of the Zeiss."
The Zeiss SF 8x32 and SF 10x32 are particularly good at controlling CA because I see almost no CA in the center or on the edge in either of them, and I have never seen that before in the dozens of binoculars that I have tested for CA. I use a similar subjective method of testing for CA that Allbinos uses, so it is not perfect, but it should give you an idea of how well a particular binocular controls CA. Allbinos also agrees that some Zeiss models like the SF 8x32 have the best CA control they have ever seen, so is it the glass or something in the optical design of the binocular, like more ED lenses in the optical train?
From Allbinos
"Also chromatic aberration correction result, one of the best in the whole history of our tests, is achieved despite such a wide field of view. If you don't like CA effects, the Victory SF 8x32 is definitely your pair of binoculars because it fares distinctly better than all binoculars produced by its main rival, Swarovski. Swarovski binoculars have noticeable problems with chromatic aberration on the edge of the field, which is often narrower than the field of the Zeiss."
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