Hi Yoda,
I'm no expert ...., but in the video(s) below, this guy is (these guys are) another story....
BTW To focus use your Canon 450D in live view mode with LCD magnifier (Upto 10x ?) set to ON (Much easier than using optical viewfinder at night). Use moon as start and take test image and also retest and take test image on object of interest. No Autofocus. If using optical viewfinder make sure eyepiece correction is correct for you. Around ISO 800 or 1600 should be good (maybe even 400).
Best
JA
also try....