>...it would be useful to know, for common wedge types, how many
>turns of the wedge alt-az adjustment knobs correspond to one degree
>of movement in the corresponding direction, or alternatively how
>many degrees of movement to one turn of a knob.

I haven't done the math, but I suspect that for a Mettler wedge, this isn't a linear function. The Mettler wedge uses turnbuckles to adjust the angle of the platform, so the geometry of the triangle constantly changes. A linear change in the length of one side will produce a non-linear change in the opposite angle.

Mike Dodd

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