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stretched stars, new guidescope worse guiding?
I have a CEM70 and I've just mounted an edgeDH8 on it+reducer.
Plate solving says the EdheHD + reducer is 1450mm - sounds about right.
My old guidescope is an orion 50mm f3.5 - plate solving says it is 162mm
However, the stars are stretched in spite of good alignment. The guider reports it is guiding at approx 0.5" to 0.8" (ASIAIR).
So today I tried an Orion 70mm f4.5 guidescope.
After re-calibration the guiding numbers are worse!! 0.8" to 1.2"
Does this make any sense?
I have guide speed at 0.25X. I tried 0.5X and the numbers were still worse.
Any thoughts?
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