A quick Schmidt-Cassegrain provides a wider field of view, but also requires precise collimation. You’ll want to be able to adjust it easily. With Bob’s Knobs for the Meade 10 inch widefield f/6.3, you replace the screws on the secondary holder with larger knobs, allowing you to adjust the alignment by hand.
This set is intended for the 10 inch Meade SCT in the widefield version with f/6.3. With a Schmidt-Cassegrain telescope, you adjust the collimation using the screws on the secondary holder. You will find more of this type of viewer in the catadioptric telescopes.
Replace the screws one by one and then check with a bright star to see if the rings are centered properly. Without a clear sky, you can also use a artificial star for the star test use.
For a 10 inch SCT with f/10 and three screws, there is a set for the 10 inch f/10.
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