The Leica Vario-Elmar-R 75-200mm f/4.5 is an earlier version of Leica's R-mount telephoto zoom, with the slightly narrower 75-200mm range versus the 70-200mm (ID 4475). The constant f/4.5 and Leica quality apply similarly. The 75mm starting point is 5mm longer than the later 70-200mm version — a minor difference.
Optical performance is good — Leica R telephoto zoom quality. The 75-200mm range is marginally narrower than the 70-200mm version. Sharpness is respectable. Constant f/4.5. The optical quality difference between the 75-200mm and 70-200mm versions is minimal — both deliver good Leica rendering.
Leica R mount. Filter thread and weight vary. Build quality is Leica. Manual focus. The 75-200mm is the earlier version — the 70-200mm is preferred for the slightly wider starting point. Both adapt to mirrorless. The difference is minor in practical use.
Available at R-mount prices — may be slightly cheaper than the 70-200mm. Check zoom and focus. The 70-200mm version is marginally preferred for the wider start. Both are good Leica telephoto zooms. Adapts to mirrorless. The minor range difference is rarely significant in practice.