Quote:
Originally Posted by Andy01
Impressive!
Can I ask a stupid question?
I thought flexure was only from guidescopes and it disappeared with OAG?
I guess I'm uncertain as to exactly what you've locked down here, would you please explain in more detail what you have done?
Cheers
Andy
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Very good question!
With F3 an off axis guider would be next to useless if there was flexure between the optic and the camera.
For sure the star that was being guided on would not move relative to the optic depending or on where the off axis guider was mounted. If the camera was moving relative to the optic this is all a waste of time as the critical alignment needed with F3 would drift off!
Guide chips on cameras will fail also as the alignment will change with mount orientation.
Do we mount the guide scope on the camera or the optic?
This is a moot point as the slightest flexure between optic and sensor would again lose good alignment and result in distorted stars at some corner/s.
The problem with fast F3 optics is the very small critical focus zone. In the case of the RH200 it is less than 20 micron!
The only solution is to eliminate ALL flexure!
Then it does not matter how the system is guided!
Bert