Adjustment screws for the viewfinder of the orange Celestron C8 (C8org) | Bob’s Knobs

If you still use a classic orange Celestron C8, you know how flimsy the small collimation screws on the secondary mirror are. With Bob’s Knobs for the orange C8, you replace them with screws with a large knob. Then you adjust the mirror with your fingers instead of with a screwdriver right in front of the corrector plate.

Over the years, several versions of the C8 have been produced. So please check beforehand whether your telescope is indeed the orange version for which this set is intended. You can see what the current generation looks like in the photo below. Schmidt-Cassegrain telescopes.

Replace the screws one by one and then collimate again on an unfocused star. If you often take the C8 outside, a rainband for 7 and 8 inch the corrector plate is dry.

There is a model for the C8 from after 1980. separate set with standard wire.