Question to Sky Watcher MN190 owners

[coenie777]

If you own the above telescope and are comfortable taking it apart to clean etc, would you mind checking if your telescope has the following on the optics:

 

- Primary mirror: serial number plus two vertical lines drawn on the side of it.

- Corrector: on the inside of the center hole, a vertical line. This can be seen without having to remove the fitting by looking at an angle at the fitting. On my telescope it is very light but definitely applied.

 

If you have a factory original setup between the primary mirror and corrector, is there any relation between the two vertical lines on the primary mirror and the one vertical mark on the corrector? Is the corrector's vertical line perhaps in line with the two vertical lines on the primary?

 

Lastly, on the corrector; is your vertical line closest or furthest from the focuser, or maybe at a random position? I am suspecting that this line will either be on the side of the hole closest to the focuser or the opposite side.

 

I would really appreciate it if anyone with a factory original setup could have a look and let me know.

 

Best,

Coenie