Hi Terry
With the short exposure test should the images be shot quickly, ie 30 second delay between each pic or should i allow longer?
Regards
Carl
Quote:
Originally Posted by Terry B
Guider on.
The purpose is to see if there is any movement between your 2 scopes ie "flexure"
The other way to test is to guide with one scope and then take a time series of relatively short exposures through your imageinig scope. The exposures need to be short enought that poor guiding isn't a factor. 10 secs is probably enough.
Then display the time series one image after another. If there is no flexure then the stars should stay in the same spot on subsequent frames. If after 10 mins or so they have moved considerably then you have flexure.
Try this aiming both east and west. You will find that there is a difference if there is flexure as the flexure will vary depending on the orientation of the scope.
|