[neilallison (Neil)]

Calling all the R200SS collimation gurus out there.

So, I found a document which explains the collimation process for an R200SS (which I have attached here).

One of the instructions is to place a small dot on the secondary mirror offset by 3.8mm from the centre.

My questions on this step are: 1
1. What should I be making the dot with ?
Tippex (if that even exists any longer), Nail polish, Felt tip pen, Small sticker........

2. Can the dot be left in place after collimation?

3. If the dot needs to be removed, how to best remove it without damaging the mirror?


I tried to use the OCAL collimator but can't make head nor tail of it.