Newtonian to Astrograph telescope conversion
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Convert your small, cheap newtonian/reflector telescope to an equally small and cheap astrograph
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Informacje o modelu
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- Printables
- Kategoria
- Physics & Astronomy
- Licencja
- Creative Commons — Attribution — Noncommercial
My Aurora II 114/450 reflector telescope was good for backyard viewing. But I wanted to mess around and explore some astrophotography. Unfortunately, my DSLR was unable to reach focus without a 2x barlow lens, which made it much more difficult to capture the large targets I was aiming for (Orion's nebula, Andromeda…). So this spacer pushes the rear mirror up enough that focus can be reached without a barlow lens. I did replace the clip screws with longer versions and had to model a quick shim for the clips to remain square.
When assembling, make sure not to ‘pinch’ the mirror with the screw clips as well as to center the spacer and mirror as best you can. An added bonus of this design is that the spherical mirros's negative effects are mitigated by the effectively smaller aperture since less light from the outer edges of the mirror are reflected into the diagonal mirror.