Quote:
Originally Posted by Bassnut
Stretched, I can see massive differences in sub alignment (as you say "overlapped rectangular frames at various angles"). You have some serious movement in your image train between subs, almost as if the camera is loose and flopping around (rotation and position), but only between subs, not during exposure. Are you bumping the scope or moving stuff between exposures?.
And, what was the ISO?, 15mins is a long exposure for a DSLR, yes low noise, but the bright stars look saturated.
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Thanks for the ongoing help guys. no i did not bump or move the scope and all 6 light frames look good.
let me clarify. the difference in sub alignment is only apparant in this stack in which i had certain DSS settings(not sure what they were now as i was experimenting with several settings). it is not at all evident in other stacks using the exact same data only with different DSS settings.
the thing is that the stack where the sub alignment is out is the stack which has much less noise.
if you want a quick look here are 3 stacked images straight out of DSS. all using the exact same data, 2 of which show sub mis-alignment but with considerably less noise than the other one which is well aligned.
how do i get the low noise of the 2 mis aligned stackes combined with the proper alignment of the 3rd stack?
it must have something to do with the dss settings, however i have not been able to reproduce the error.
also-iso was 800.