Having had a very brief look at it, I realized it's not just a translation of the 2nd edition in German, but has been rewritten, amended and freshly illustrated in numerous places.
I was looking forward to such revisions. Unfortunately I haven't dug deep enough to discover them yet, but on scanning the contents of the English translation I instantly noticed what should have been obvious already from John's post #1, that entire chapters have actually been
omitted, to wit:
2. Ferngläser - der Einstieg
[Binoculars - getting started]
2.1 Das Prismenfernglas: Ursprung und Wandlung
[Prism binoculars: origin and development]
2.2 Porro- und Dachkantfernglas
[Porro and roof prism binoculars]
2.3 Vergrößerung
[Magnification]
2.4 Objektivdurchmesser und Austrittspupille
[Objective diameter and exit pupil]
2.5 Sehwinkel und Sehfeld
[Angle of view and field of view]
2.6 Zur Handhabung von Ferngläsern
[On handling binoculars]
2.7 Jedes Fernglas ist ein Kompromiss
[Every binocular is a compromise]
11. Anwendungsprofile für Handferngläser
[Applications of handheld binoculars]
11.1 Die Generalisten
[Generalists]
11.2 Ferngläser für Reise und Wanderung
[Binoculars for travel and hiking]
11.3 Ferngläser für Nacht und Dämmerung
[Binoculars for night and twilight]
11.4 Handferngläser in der Astronomie
[Handheld binoculars in astronomy]
11.5 Militärferngläser
[Military binoculars]
11.6 Ferngläser zur See
[Binoculars at sea]
11.7 Ferngläser mit Bildstabilisierung
[Image-stabilized binoculars]
11.8 Die Kompakten
[Compacts]
11.9 Operngläser
[Opera glasses]
11.10 Digitalferngläser
[Digital binoculars]
13. Kleine Kaufberatung
[Brief buying advice]
13.1 Was die Premiumklasse bietet
[What the premium class offers]
13.2 Die Mittelklasse: Suche nach dem Kompromiss
[The middle class: seeking a compromise]
13.3 Schnäppchenjagd
[Bargain-hunting]
13.4 Zehn Gebote zur Fernglaswahl
[Ten Commandments for choosing binoculars]
Which is to say that this edition is entirely devoted to optical principles now; discussion and illustration of binocular development, specific models and applications, and choosing among them has been eliminated. (Oddly enough, that happens to be the subject of Neil English's new book, whose title is mentioned in the very first sentence of his introduction to this one...)