[John K]

Hi guys.

If my PHD guiding graphs appear quite good but I am still getting slightly elongated stars and the images I am getting are gradually shifting in one direction in the field of view is this likely flexure?

Can a helical focuser with "slop" in a short focus refractor used as a guidescope contribute greatly to flexure or is it most likely the attachment rings?

Thanks in advance for any advice anyone can offer!


John K.