I like my refractor very much. However, some bright stars have soft edges.
Having a closer look at the objective, I noticed two things
1. Small metal spacers inside the lens like 1 cm long and 3mm thick - a kind of 120 deg separated
2. (I bought my scope used) - some traces of something on the ID of the objective - meaning most probably here was some sort of aperture stop ring that covered these spacers.
So I am thinking now, is it really good idea to make and install some aperture ring - like 4-5mm (I know that decreases the aperture) hoping that it will help with star edges?
who can print such aperture ring for me? 6 inch refractor.