Dennis praising the SFL again:
It is a mistake to assume that because the SFL is less expensive than the SF that Zeiss used cheaper glass in it, and it is going to have more CA. The SFL is an $1800 binocular, and I am sure Zeiss used very high quality glass in it. The only noticeable advantage I can see between the SFL and SF is the SF has a bigger FOV and that is because it has more complex, more expensive and heavier eyepieces. Just because the SF has fluorite in its glass does not necessarily mean it is going to have way better CA control. A lot of it has to do with the quality of glass used and the overall design of the binocular. Probably the majority of additional cost of the SF is due to the more expensive WA eyepieces, not the quality of the glass. I have compared a lot of binoculars for CA and the SFL ranks right at the top with the best alpha's and the only binocular I have seen that was slightly better was the Zeiss FL. As far as color purity, meaning whites are white and blacks are black, it is one of the best.
And what about the NL Pure you might ask? Well Dennis agreed with this post:
It sounds like they were very impressed with the SFL. They agree with me that the CA on the SFL is about the same as the alpha's. The NL Pure looks like it still has the glare problems I experienced with diffuse light when I had mine.
"The new Zeiss SFL 8 × 40 is a great product, it will cost around 1900 euros, has a weight of 32 mm binoculars, is very sharp, with a chromatic aberration similar to that of a 2500 euros TOP OF THE RANGE and also won hands down against the NL PURE in the morning backlit observation of some jays. For the record, the field of view was completely legible, but the same could not be said of the NL, especially in 8 × 42. The larger format binoculars, owned by one of the “Marco” present, also have fewer problems with diffused light during the backlit observations that we verified with the participants during the event. Pity. I always hope that Swarovski solves this flaw that stains a valid product."
My point is just that in the current discussion it is entirely appropriate to refer to the SFL as "Alpha Class" although they are not as expensive as either the NL or the SF. It's a matter of needs and taste. Trading weight for FOV. Image quality is clearly on the same page.