Replaced an AD 9x28 with a pair of ZD 10x50 WRs.
"The brightness gain is astonishing. Instantly obvious in good light, but in lowlight these have the power to amaze! I’m afraid it has spoiled the smaller design for us (relative brightness of 25 vs 9. 6). Tripod adaptor bushing and lockable diopter ring are also selling points (9x28 has neither). I am not comparing like for like here AT ALL, so this is NOT a fair comparison, but the size and weight seem like a price worth paying for the dramatic improvements on offer. Anyway, it’s my wife who’ll be carrying them……… Only drawback? Bigger, heavier and 10x, as opposed to 9x, makes these marginally harder to hold steady for longer sessions when handholding, but that’s why we wanted a tripod adaptor bushing."