It can be pretty confusing. Especially with new models coming out every few years.
Zeiss, Leica and Swaro offer three 'flavors' of binocular at the top end. You've got your rangefinding binoculars: Leica Geovid, Swaro EL Range, Zeiss Victory RF. Then you've got your flat-field binoculars: Swaro EL, Leica Noctivid, Zeiss Victory SF. And then you've got your non-flat field binos: Swaro SLC, Leica Ultravid, Zeiss Victory FL & Victory HT.
Then you've got your second tier binoculas from each manufacturer: Leica Trinovid, Zeiss Conquest and Swarovski CL.
There may also be an essoteric category. Leica offers the 'Duovid' (a binocular with dual magnification)....Swarovski offer the 'Habicht' (a traditional Porro Prism binocular with ridiculously good light transmission and retro appeal). Not sure what Zeiss does.
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