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Star trail sometimes when expose longer than 30 sec with telescope
Hi all,
I have an unmod 600d, skywatcher BKP 150 (or something) f/5, EQ3-2 mount, orion driver motor which set to 2x speed.
I use DSLR method to do the polar alignment and just wonder why when I taking some photos which expose longer than 30 sec (sometimes is shorter) it has star trail? It doesnt happen to all photos but random.
Will that be either my scope is not balance correctly or the wind as I do it in balcony... or what else can it be? I will try to upload some sample photo later....
p.s. the star trail not very long when zoom to 100%
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