Samyang 135mm f/2.0 ED for astronomy with EAF by RomanHujer 3d model
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Samyang 135mm f/2.0 ED for  astronomy with  EAF by RomanHujer

Samyang 135mm f/2.0 ED for astronomy with EAF by RomanHujer

by Thingiverse
Last crawled date: 3 years, 4 months ago
Adapting Samyang135mm f/2.0 ED lens for astronomy with EAF or OnStep focuser
EAF holder is compatible for SCT and Newton telescope.
For fine manual focus ring available too.
Optional rings for old Carl Zeiss Jena Sonnar 180mm F/2.8 lens available only for manual focus.
OpenSCAD source code on GitHub
BOM
1x Samynag 135mm f/2.0 ED (Canon, Pentax, Nikon, Sony ....) lens
1x ZWO EAF
1x ZWO ASiair (Pro)
1x GT2 Timing pulley 20Teeth/Bore 5mm
1x ~400mm GT2 Open Timing Synchronous Belt 6mm
6x M4x20mm imbus screew
2x M4x20mm Hex Head Screws
8x M4 nuts
10x M3x25mm screew
13x M3 nuts
1x 1/4" - 20 UNC photo screw
Optional for OnStep focuser
1x Nema17 Stepper motor 17HS15-1704S
1x GT2 Timing pulley 16Teeth/Bore 5mm
4x M3x10mm imbus screew
4x Self Tapping Screw 2x6
1x RJ45 - PCB on EasyEDA
Update
2021-01-01 Add beld tensioner

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