I am looking for some advice about my EQ6 mount. It is the basic model, without GoTo and without PEC. It lets me doing astrophotography taking short exposures with short focal lengths.
Recently I took several shots to M42 and after stacking without movement correction I got a picture of the periodic error of my EQ6 mount.
After measuring the distance between peaks and valleys I found it yields 40 arcseconds of periodic error, and it takes 6 minutes to complete this distance from peak to valley.
Just wanted to know if that values are what you should expect from an EQ6 mount or if they are much worse. I would also want to know about alternatives to this mount with better periodic error values and similar price. Thanks for any help or tips you could offer me.