Keith Geissler:Dave Ek:Keith Geissler:
I got mine about a week ago also. I am using it with my 533mc pro. So far I think my collimation is pretty good. I also captured NGC 891. This was my first image. About 7 hours of 5 minute exposures.
Very nice, Keith. Are you using off-axis guiding?
My initial attempts to collimate may have actually made things worse. I've been working through the process this afternoon with the tilt plate installed, and I think it's much better now. Will have to wait a few days for clear skies before I can check it again.
I am using an Askar OAG, 174mm mini. I also have the tilt plate. However, I am not sure when to adjust that versus the secondary or primary. Do you know when to adjust each one for collimation? I used a Cheshire eyepiece for my collimation, then did a "defocused" star test. I also just got my tri bahtinov mask in the mail today. I will see if I can fine tune it more.
Hi, personnaly I am using ocal 2 and I adjust the tilt at the beginning of the procedure by centering the donut on the secondary in the center of ocal cross (once occal has been set correctly and assuming that donut is well centered , mine is well centered) . Then I do the primary, then the secondary, then I reajust the tilt if the donut is no more well centered. Then doing all this sequence primary,secondary, tilt until everything is well concentric and all centered and it is done. The more you advance in the process, the more you have to be very delicate on the collimation screws.
