How Long Can Nexstar Evolution Track Before Star Trails Appear?

[DaveyLeo10]

Is there anyway I can figure this out. There's no wedge but most images I take are single 30 second exposures with my DSLR. I've tried bulb mode a few times but it would be ideal to roughly know the max time I can shoot before trails appear!

Thanks

[ollypenrice]

The question can't be answered with any precision. The location of the object in the sky is a major factor and so are the vagaries of individual mounts.  At your very fine pixel scale you will start losing resolution to tracking error very quickly indeed. The best thing is to try different exposures on each object and see how you fare.

Olly

[DaveyLeo10]

Thanks Olly, I'm enjoying working it out!