ES127 Refractor

[newbie alert]

Looks like in 1 direction.. could be backlash, pa, balance... What's the light area  circles at the top of the image?

[alacant]

4 hours ago, Simon Pepper said:

I believe this has to be either flexure (which I don't really know what that is

Hi

Flex. This is when the guide telescope is moving relative to the 127 as the assembly changes angle. This is because you have it mounted on the flimsy finder shoe.

Instead, put the asair in the finder shoe and mount the guide telescope properly to the handle.

Here is an example of how rigid the assembly needs to be. This rigidity is needed even over just 420mm focal length. At 1 metre, it becomes even more imperative.

The OAG will of course do it, but represents more expense and more work to have to do. 

Cheers and HTH

 

Edited July 12, 2022 by alacant

[Simon Pepper]

3 hours ago, newbie alert said:

Looks like in 1 direction.. could be backlash, pa, balance... What's the light area  circles at the top of the image?

The bottom of M51  sorry zoomed in there. Thanks 

[Simon Pepper]

36 minutes ago, alacant said:

Hi

Flex. This is when the guide telescope is moving relative to the 127 as the assembly changes angle. This is because you have it mounted on the flimsy finder shoe.

Instead, put the asair in the finder shoe and mount the guide telescope properly to the handle.

Here is an example of how rigid the assembly needs to be. This rigidity is needed even over just 420mm focal length. At 1 metre, it becomes even more imperative.

The OAG will of course do it, but represents more expense and more work to have to do. 

Cheers and HTH

 

Thanks for this the OAG just turned up so will try this fingers crossed! 

[Neil_104]

Hi Simon, how did you get on with the OAG in the end, did you see an improvement with your guiding? Or did you find another solution? ...............Or did you call it a night with the 127 on the HEQ5? 🙂