Re: 130GTX Autofocus


Mar 10, 2017

 


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#55987 Mar 10, 2017

Just installed an Optec Focus Boss II with HSM motor on my 130GTX - what a sweet combination. Smooth as silk and handles my cameras with ease.

Just a minor question for those who may have the same combination. I'm told that the step size is 1.2 microns/step. However, when I calibrate against the 110 mm scale��on the focuser drawtube, it's more like 1 micron/step or even a little less (like 0.97). Anyone else check this?

Also, I'm assuming I should significantly loosen the focus brake when using an automated focuser?

Thanks!

Wayne



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#55989 Mar 10, 2017

Thanks Don, to the best of my measurements, it's about 0.96 microns/step. I'm going to round it out to 1. It's used by my autofocus software in it's calculations



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