Hi Ian,
I use exactly the same system for about 3 yrs now. and am able to get the optimum focus point using the reducer. I have the same trouble with focus shift and meridian flip any solution other than get a fork mount would be useful. I could otherwise upgrade to the newer my older Paramount ME to the newer versions that have greater meridian allowance before flipping. i usually only work 2hrs either side. But I digress any improvement in our present situation would be nice.
Eric
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-----Original Message-----
From: cosmoimager@... [C14_EdgeHD] <C14_EdgeHD@...>
To: C14_EdgeHD <C14_EdgeHD@...>
Sent: Sun, 22 Nov 2015 19:23
Subject: [C14_EdgeHD] Focus Shift on HD after the Meridian Flip
I have my 14" EdgeHD for over 2 years now. It originally had a problem with not holding it's collimation and had to be sent back to "C" where they "span" it - much better after that. I use it mostly for DS imaging with 0.7X focal reducer and Moonlite focuser. Everything seems to be very tight and sturdy. I focus it first crudely, lock the mirror then use Moonlite to tweak it. It all works fine even for long slews, until I do the Meridian Flip. After that focus is gone, collimation too is worse (though still usable). It usually is off by 100 steps or so.
Any idea what can cause such a shift?
Thank you for any thoughts.
Ian
