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    Re: Lunar Distances with Alex's SNO-T
    From: Bill B
    Date: 2006 Nov 02, 15:38 -0500

    Alex
    
    >> Agreed. If outdoors will work in a November
    >> with December temperatures, how
    >> about the old K-Mart parking lot?
    >
    > Are not people driving and walking there all the time?
    
    Not really.  The K-Mart is abandoned.  Only the the Radio Shack and 3 other
    small storefronts do any business.  That leaves the whole "anchor store" lot
    vacant unless they are selling bulk mulch in the warmer months.
    
    > There is only one "focused" state of the
    > telescope eye system.
    
    At infinity, yes.  The scope is fine-focused for the user's eye.
    50 ft and 500 ft are not infinity.
    
    > It is in this state IC and other measurements
    > have to be taken. When the image is
    > maximally sharp.
    
    Agreed, but will the scope be focused for the tests as it was for the user's
    scope/eye system at infinity?
    
    When we tested several scopes side by side, we agreed that the optics may be
    adequate for the intended use--celestial navigation--but were a far cry from
    excellent.
    
    I also recall one evening you were using my sextant and scope, refocused for
    your eye and declared there was side error. I focused for my eye and there
    was no side error.  While George claimed changing focus could not affect
    side error, others on the list report seeing it too.  If changing focus can
    affect side error, I submit it may also affect perceived IE.  Hence my
    concern.
    
    Bill
    
    
    
    
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