[ATM] How many zones

[hermit at outofoptions.org (Ken Lowther)]

Hit send too quick.  On thing is to make sure TOTAL travel is good.  You can use
just the inner and outer for that.  Experiment a little to become comfortable.

Ken

Quoting Jonathan Bishop <jonathan_bishop@sbcglobal.net>:

> Hi,
>
> I am figuring an 8" f5 mirror. Can someone recommend the number of zones to
> measure? I read Tex and he discusses using 4 zones, but that is for an 8" f8
> mirror (or was it f6).
>
> Since I am new to this probably 4 zones is easier, but will it be sufficient?
>
> Thanks,
>
> Jon Bishop
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Hermit, holed up in Youngstown, Ohio