Alternative front part for DBS114 fitting TSRPN2 focuser
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This is an alternative front piece for the DBS 114 astrograph which brings the focus very close to the secondary mirror.
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- Printables
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- Physics & Astronomy
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- Creative Commons — Attribution — Noncommercial — Share Alike
If you want to get the focal plane of the telescope as close as possible to the secondary mirror, you can use this modified printed front piece together with the following extra short focuser:
With this configuration, you can get pretty good illumination even with relatively large APS-C sensors.
The holes in the front piece are designed to fit the focuser directly without its mounting plate, saving some additional millimeters. The tolerances are very tight so prepare to maybe sand the mounting hole down a few tenth of a millimeter.
The focuser is fixed into position by 8 set screws. There are two holes for heat inserts on every side in analogy to the mounting of the focuser in its original mounting bracket.
https://cnckitchen.store/products/heat-set-insert-m3-x-5-7-100-pieces
The model was printed from PPA-CF to give maximum strength and stiffness to the part.
On both sides of the focuser, there are 6 holes for M4 heat inserts (short) for mounting of accessories like a motor focus which I am designing right now and uploading once finished.
https://cnckitchen.store/products/heat-set-insert-m4-x-4-short-version-100-pieces