Samyang 135mm f/2.0 ED and 85mm f/1.5 UMC VDSLR for astronomy with EAF
Description
Adapting Samyang135mm f/2.0 ED and 85mm f/1.5 IF UMC VDSLR lens for astronomy with EAF or OnStep focuser EAF holder is compatible for [SCT](https://www.thingiverse.com/thing:3992198) and [Newton](https://www.thingiverse.com/thing:3992200) 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](https://github.com/romanhujer/Samyang-135-for-Astronomy) ###BOM 1x Samynag 135mm f/2.0 ED (Canon, Pentax, Nikon, Sony ....) or 85mm f/1.5 UMC VDSLR lens 1x ZWO EAF 1x ZWO ASiair (Pro) 1x GT2 Timing pulley 20Teeth/Bore 5mm 1x ~400mm GT2 Open Timing Synchronous Belt 6mm (for Samyang 135mm) 1x 136mm GT2 Closed Loop Timing Synchronous Belt 6mm (for Samyang 85mm) 10x M4x20mm imbus screew 4x M4x25mm imbus screew 2x M4x20mm Hex Head Screws 12x M4 nuts 3x M5x30 imbus screew 1x M4 nuts 10x M3x25mm screew 13x M3 nuts 2x Ball Bearing MR115 (5x11x4mm) 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](https://easyeda.com/hujer.roman/focuser_port_for_onstep-minipcb2) ##### Update * 2021-01-01 Add beld tensioner * 2021-01-27 Add support for Samyang 85mm f/1.5 UMC VDSLR and some improved
Statistics
Likes
34
Downloads
0