pshute, post 87,
The effect of magnification on image quality of handhold binoculars is very well investigated by Russian scientists and by Zeiss scientists, I have published some graphs and references on Birdforum some time ago, but if one is interested I could repeat it. One graph can be found in a review of published literature I have published on the WEB-site of House of Outdoor entitled "Color vision, brightness, resolution and contrast in binocular images" figure 39 (the paper is in English). You may be surprised by this graph, since it indicates that at magnifictions of 6-7x and more resolution rapidly declines when handhold. The Russian investigators reach the same conclusions.
Gijs van Ginkel
Here is the graph to which Gijs refers, the gap between the two curves represents the detail lost by hand-holding instead of using supported binos:
Lee
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