I need some assistance. I have collimated a newt before many times but this mak newt is a bit more challenging. I have tried for two nights, with a collimation cap, and a hotech laser collimator, but I simply cannot get perfect round stars out of focus on either side of the periphery.
On axis, the perfectly concentric Fresnel rings appear, then the out of focus diffraction rings morph to look like a bite is taking out of the bottom right side, as it drifts up and to the northwest in my field of view (looking at Aldeberan in Taurus)
The star focusing down to a sharp point more or less with a 10mm eyepiece (I know, not high enough), but I know something is wrong and I cannot fix it with the two tools I have.
I presumethe shipping of the scope possibly knocked the entire secondary mirror so it is not centered square with the focuser, and I might have to adjust the middle secondary screw but I dont want to damage the secondary mirror or primary mirror by playing with the center one.
I am wearing out these old secondary screws and figured I should stop while I am ahead. I broke one of 3 of the secondary collimation screws already.
Any suggestions? Thanks in advance!
I have attached a picture of the broken secondary screw, and the center screw I am thinking about playing with now.