|
Hi Chris, your image looks good to me.
At f/4, I’ve noticed that by far the greatest error in collimation I get is not millimeter precision in mirror alignment, but rather getting the camera square in the focuser. To highlight this, you’ll notice that if you remove the laser collimator from the focuser and place it back in, the dot will likely no longer be in the center of the primary mirror. The trick is consistent screw tightening when securing your laser & camera in the focuser. I personally take the slack out of the screws and immediately stop as soon as I hit resistance, then tighten each screw incrementally, one at a time.
I cannot emphasize how much this technique has positively impacted my star shapes at f/4. Hopefully this might help you achieve your perfect collimation.
Regards,
Stephane
|