|
I think Richard (and possibly others) mentioned the primary mirror clamps - I'd definitely be checking those, as I had star shapes quite like yours when I tightened mine too much after cleaning the mirror one time - as Richard said these need to be barely touching the mirror with minimal pressure. If it's not that, then I'm not sure, others will know more than me on other issues. And collimate at roughly the tube elevation of your target as it can shift around a bit (I learned that the hard way on planets after over a year of lazy horizontal Newt collimation).
|