Summary

Camera piggyback adapter for old (1986?) Celestron C8 - It can be completed with a rubber autoadhesive pad on the top and a camera screw.
See here: https://www.tinkercad.com/things/6yvYfitmu7R-c8-piggyback-camera-adapter-v7 for the original design

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Prusa Mk2</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>70</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>70%infill - 3D Honeycomb - 3 Perimeters.<br>Printed upside-down - it should be printed to have support printed horizontally to gain strenght.</p></div>

How I Designed This

Pure guess

            <div><p>I tried to reproduce the old Celestron aluminum adapter.</p></div>

Celestron C8 piggyback adapter