Somehow I keep loosing these adapters, so here is a 3D printable set of anything I could think off. Obviously print them in a colour that doesn't allow light to come through, black is a good choice. PETG seems a good choice, it is a little flexible which is of benefit for the threads.

T2 extender set:

5mm (supports required)
7.5mm
10mm
15mm
30mm
50mm

T2-T2 adapter:

T2-T2.stl: supports required
T2-T2-builtinsupport.stl: builtin support

M42-M48 adapter to insert 2" filters, standard pitch is 0.75, Baader Planetarium filters might be 0.60:

M42-M48.stl: supports required
M42-M48-builtinsupport.stl: builtin support
M42-M48-0.60.stl: 0.60 pitch for Baader, supports required
M42-M48-0.60-builtinsupport.stl: builtin supports

M42 external thread for 1.25" filters (1.125", 42 tpi):

M42-1_25_filter.stl

M42 external thread to 1.25" tube:

M42-1_25-20mm.stl

1.25" to 1.25" adapter, 1.125" inner thread, 42 tpi:

1.25-1.25.stl: supports required
1.25-1.25-builtinsupport.stl: builtin support

inner T2 - outer M42 adapter

t2-m42.stl: supports required

Unless stated otherwise:

external M42 threads are 3 mm.
M42 pitch is 0.75.

Tested with:

tolerances are about 0.2mm
0.40 mm nozzle at 0.10 mm layer height
0.60 mm nozzle at 0.15 and 0.20 mm layer heights
PETG
3 permimeters
Ensure vertical shell thickness: Off
use minimal infill, most objects work with 0%

Todo:

SCT to M42 adapter
SCT to T2 adapter

T2, M42, M48, 1.25" adapters

by Doranku · original on Printables ↗

Learning / Physics & Astronomy

♥ 37⬇ 1.0k🖨 0 prints

License: GNU General Public License v3.0 ↗filtercustomizableadapterthreadopenscadt2m42baaderm48planetariumbaaderplanetarium125inch

Print profiles

M42-1_25-20mm.stl
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T2-10mm.stl
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T2-7.5mm.stl
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T2-15mm-M48-0.60.stl
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1.25-1.25-builtinsupport.stl
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T2-15mm.stl
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T2-T2.stl
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1.25-1.25.stl
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T2-T2-builtinsupport.stl
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M42-M48.stl
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M42-M48-0.60-builtinsupport.stl
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T2-50mm.stl
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M42-M48-builtinsupport.stl
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M42-M48-0.60.stl
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M42-1_25_filter.stlDEFAULT
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T2-15mm-M48.stl
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T2-5mm.stl
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T2-30mm.stl
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t2-m42.stl
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