Quote:
Originally Posted by AlexN
 Nicely done Steve! Get real technical like and add an autoguide port to your mount (dont ask me how or even if its possible...) but man! if you can achieve image like you have been with 5sec subs.. imagine if you push it out to 1~2 mins!
Top job indeed... definitely making that setup shine!
Alex. |
Thanks Alex.
John and I were discussing the Pickering scale last night.
You would obviously have seen a low to medium power view of
a typical bright star through a scope at about F5-7?
Unless you're about 8-9 on the pickering scale, there is just
no way you can do time exposure on a scope at these
focal lengths and not make the star blur into a blob.
You would just be stacking blobs.
You wide field guys make some beautiful stuff....but that
is all because you are so wide field.
Your stars are hopefully still pinpoints and your tracking
issues are far less critical.
Like I said...about 5 sec exposures at FL 1500 is about all I can
get away with on any night with Pickering scale hovering around
6 or 7.
With some rare cells of very steady seeing, I can stretch it out to
30seconds sometimes but I'd maybe capture a few dozen good frames
in 6 hrs of dark. I wiah I lived on top of Mauna Kea
Steve