Posts Made By: Hoyoung Kang

I was trying to align ETX125PE.
I did as indicated in the manual.
Put scope in home position - counter clockwise fully and point zenith. then Followed alignment procedure as indicated.

When I tried go to, my scope position object slight left(right in the view field). Then I tried to move to the center of field.
But my scope send it back to the original position.
it is keep trying to return.

What is wrong with my system? or my procedure.

Well for the reasonably small aperture, seeing means image shift within short time.
Human eye response is slower than 0.1sec. then we see blured image.
That might be corrected by fast moving adaptive optics such as Orion photography AO.
I wonder anyone tried with visual observation with 50times image correction per second.

In professional observatory with AO, they think they have to correct at least 50 times per second and correct for each small segment of aperture - typically 20cm.
That means 20 - 30cm aperture needs only image shift.
Even 50cm can have benefit of image shift correction.