Stephen Prower
Well-known member
The Swift Osprey was sold as a 7.5x42 binocular. But my pair (S/n: 844121) perform so close as to apparent magnification and depth of focus to a pair of Nikon Action VII 7x35 binoculars as to make me ask: Is the Swift Osprey closer to 7x than 7.5x magnification?
Incidentally I have never seen anyone on the Forum claim for 7x binoculars the great advantage in performance that they have over higher-powered binoculars when looking through imperfect window glass. I suppose that this is a function of depth of focus -- And the Swift Osprey does also match the performance of the Nikon Action when viewing through the same imperfect window glass that far more markedly mars my observation of garden birds through more powerful binoculars
Stephen Prower
Incidentally I have never seen anyone on the Forum claim for 7x binoculars the great advantage in performance that they have over higher-powered binoculars when looking through imperfect window glass. I suppose that this is a function of depth of focus -- And the Swift Osprey does also match the performance of the Nikon Action when viewing through the same imperfect window glass that far more markedly mars my observation of garden birds through more powerful binoculars
Stephen Prower