Ad Astra Observatory

Well, answer is I don’t know.

It depends on a lot of things, not the least of which is the step angle of
the motor that Moonlite uses, and the gearing of the knob that turns the
drawtube in and out.

The easiest way to figure it out would be to measure it. Use some calipers
to measure how much the drawtube is out, then move it out several thousand
more steps and measure again; subtract the difference; divide by the number

of steps you moved.

I’m not sure why DLSR needs this though. Most autofocus algorithms are
independent of step-size (at least the ones I’ve tried in the past).

James

—– Original Message —–
From: “Jimbo S. Harris” <jimbo@jimbo.net>

To: “James Lacey” <james.lacey@lazyfocus.com>
Sent: Tuesday, March 25, 2008 1:04 AM
Subject: Re: Gemini Stepper Interface

> Hi James,
>
> What’s the focuser step size for the Moonlite stepper motor? I need to

> fill in the blanks for the autofocus in MaxDSLR. It defaults to 10 microns
> (I have the choice of microns or microinches and can fill in a floating
> point number).
>
> Thanks!
>
> Best,

> Jimbo
>