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Old 30-08-2012, 08:35 PM
Carl
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Carl is offline
 
Join Date: Apr 2006
Location: Alans Flat
Posts: 375
elongated stars again after tests

I posted this problem about 3 weeks ago and have tried a few tests since without luck.
Problem: elongated stars across entire field. noticeable more when shoot M8 pointing west. Aimed at Tuc 47 and centre is ok but elongations towards edges. The elongation is all in one direction across the entire filed. This problem has only reared it's ugly head over the past 2 months since i rotated my Moonlite focuser shooting M8 and M20.

Tests:
1. Recalibrated guide star when pointing West
2. Re balanced scope
3. Added weight to east when pointing west to counter backlash
4. Removed and re fitted Hotech field flattener with rubber expansion ring. Camera attached tight.
5.Checked for any looseness or drawtube slop on anything on my Moonlite focuser

I dont believe flexure should be a problem as it has not shown up before.

I'm using an eq6 mount.
As i said this has only happened over the past few weeks. My next test will be polar alignment but my scope is locked down on a permanant pier so i can't see how things could have changed.

Any help will be appreciated. Cant guarantee a fast reply as lots on my plate.

Damned frustrating hobby this, even worse than golf!

regards
Carl
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