I need help with two things on my Mk-67.
Focuser - I've never used a Crayford before and I'm having trouble adjusting it just right. There are two thumb screws on the underside that seem to adjust the tension, but I can't seem to understand their operation. Can someone either explain this to me, or point me to some other resource?
Collimation - this seems to be much more difficult than on my old Dob. I can't seem to get it just right. My star test shows a slight tail on every star and the difraction rings are slightly of center. I've tried tweaking the seconday, but frankly I'm afraid of screwing it up even more. Any advice?
Thanks,
Dave
Focuser - I've never used a Crayford before and I'm having trouble adjusting it just right. There are two thumb screws on the underside that seem to adjust the tension, but I can't seem to understand their operation. Can someone either explain this to me, or point me to some other resource?
Collimation - this seems to be much more difficult than on my old Dob. I can't seem to get it just right. My star test shows a slight tail on every star and the difraction rings are slightly of center. I've tried tweaking the seconday, but frankly I'm afraid of screwing it up even more. Any advice?
Thanks,
Dave
