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Old 23-06-2015, 12:41 PM
rally
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Quote:
Originally Posted by gregbradley View Post
. . . .
It sounds right but when your mount is really spot on not a lot of correction is needed.
. . . .
Greg.
Greg,

Thats absolutely the case.
If your rig is rock solid, mount is properly polar Aligned and you are using a Paramount ME or equivalent level mount in terms of tracking, backlash and periodic error then your guide interval could be many minutes and you will get nice stars

I once imaged in Tarantaula in Ha and the only star available to guide with (without changing my framing or rotation angle) was extremely faint (in Ha) - so I just kept nudging up the exposure time until I got a signal to noise ratio I was happy with to guide with and as I recall that was either 200 or 300 secs
I used TPoint for mapping and probably had around 20 stars in the model but I did not have ProTrack enabled, I had PEC enabled but that was neglible in any case.

Its possible that since I was also close to the pole I benefited from less error too.
But I had no noticeable ellipsicity.


BTW That mount is for sale !

Cheers

Rally
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  #22  
Old 23-06-2015, 12:59 PM
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Octane (Humayun)
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How much, Rally?

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  #23  
Old 23-06-2015, 03:46 PM
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LewisM
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