Quote:
Originally Posted by Shiraz
hi Russ. I was not concerned so much about exposure length, but about imaging while dither is taking place.
Maybe going through the sequence will show what the concern is:
scope 1 and 2 are taking images that start at different times and with different sub lengths. Scope 1 finishes a sub and then instigates the dither, which moves the mount to point at a slightly different part of the sky and recommences guiding. When the mount has steadied, scope 1 starts the next sub. In the meantime, if scope 2 was in the middle of a sub while all this happened, that sub would be ruined by the dither offset. The only way around this is to synchronise the times at which the 2 scopes expose subs so that scope 2 doesn't try to image while dither is underway. I don't know how to synchronise the timing of two capture programs - do you know if it can be done?
Of course, this would not be an issue with two mounts....
|
Hi Ray,
Thanks for the rundown, I don't know of any automatic ways of synchronising.
I was thinking if the second scope was a dslr you could use backyard eos (or Nikon), you are able to set delay times; which would mean if you could average out the time taken on say SGP, for the sub length, download time, auto refocus and dither you could possibly have the second camera in sync by entering the time to wait manually (eg 90 seconds), that of course would rely on how consistent dither and refocus takes. disadvantage is that byeos hasn't got its own auto focus function (but I have a feeling it eventually will in later versions).
Of course two mounts would be less of a problem; however I wonder if we had two mounts we would still be looking to maximise by utilising 4 scopes
