Secondary Rotation Tool

[Northernlight]

Hi all,

Can anyone recommend any good tools or software to check secondary mirror rotation as my star tests are really bad so need something to easily check the rotation.

Cheers,

Rich. 

[Ally8446]

https://www.teleskop-express.de/shop/product_info.php/info/p5506_TS-Optics-Concenter-2--Justierokular-fuer-Newtonteleskope.html

I find this to be a fantastic piece of kit. Price is a bit steep in my opinion but it works. 

[Northernlight]

Hi Ally,

I have that tool, but i hate it, as i can't  make out the concentric circles when using - they are just too faint. The should have been coloured to make it easier to discern.  I just tried using a cheshire sight tube and found it much much easier. Thanks for the suggestion anyway.

Cheers,

Rich