EDIT 3/10/25
Updated to version 1.2.1
Fixed size of dew shield peg
Now including STLs
Updated documentation
EDIT 3/5/25:
Updated to version 1.2
No changes to the model or printed parts but the STEP files now include all hardware required for the assembly. Also the BoM has been updated and a PDF is included with exploded views to aid in the assembly.
Note that there are likely some errors in the documentation. Please bare with me while I work that out and if you find any errors please point them out so I can correct.
The documentation is still not complete so if you need help the best way is to post on the discord https://discord.gg/QdPa9ed6Jq
EDIT 2/15/25: Updated to version 1.1 which now includes STEP files for 3 variations:
- “Stock” version as shown in the video, with 3D Printed focuser and mount/gears for my electronic focuser.
- Same as the “stock” version shown in the video with 3D Printed focuser but in a belt driven variant with mount for a ZWO EAF or the Gemini EAF.
- Mount for an off-the-shelf focuser.
Notes:
- This is a 114mm diameter, 450mm focal length, f/3.95 Astrograph style Newtonian Reflector Telescope
- Designed specifically for deep sky astrophotography
- Relatively lightweight, easy and inexpensive to construct
- Integrated Helical Focuser – designed to be used with my electronic remote focuser but can be modified for use with popular off-the-shelf focusers
- BoM, STEP and Solidworks documents included in the Google Drive Share
BoM
| Item | quantity | link | cost per | |
| D114F450 high-precision parabolic telescope mirror | 1 | https://www.aliexpress.us/item/3256804066457264.html?spm=a2g0o.tm1000015580.waterfall.2.2fb46f3dz9h8xZ&skuId=12000028530588647&pdp_ext_f=%7B%22sku_id%22%3A%2212000028530588647%22%7D&aecmd=true&gatewayAdapt=glo2usa4itemAdapt | 89.99 | https://www.ebay.com/itm/145042689691 |
| 50mm eflective Astronomical Telescope Secondary Mirror | 1 | https://www.aliexpress.us/item/3256806013389244.html?spm=a2g0o.productlist.main.21.67b626cdbA3LEW&algo_pvid=b2474942-a15a-4706-91cf-35df4acdb238&algo_exp_id=b2474942-a15a-4706-91cf-35df4acdb238-10&pdp_npi=4%40dis%21USD%2118.53%2115.94%21%21%21135.43%21116.47%21%40210318c317364618224484643e1ace%2112000036238815957%21sea%21US%21946591528%21X&curPageLogUid=RJGNWvWlcujp&utparam-url=scene%3Asearch%7Cquery_from%3A#nav-specification | 18.33 | |
| Siraya Tech ABS-CF Core Filament | 2 | https://amzn.to/4jKtsr3 | 37.49 | |
| PTFE Tube | 1 | https://amzn.to/4jOPA3t | 8.22 | |
| Carbon Fiber Tubes | 2 | https://amzn.to/4hmM4M1 | 20.95 | |
| CARBON FIBER SPIDER VANES (CNC CUT) | 3 | https://s.click.aliexpress.com/e/_oF9b1e9 | Send DXF of profile | |
| Fasteners and Hardware | (Buy in bulk with Amazon links, or boltdepot.com to order the exact amount) | |||
| m3 heat set inserts | 4 | https://amzn.to/417fvMs | 9.39 | (pack of 120) |
| m4 heat set inserts | 10 | https://amzn.to/3Qc4i6U | 6.99 | (pack of 50) |
| m5 heat set inserts | 11 | https://amzn.to/3WTDHPK | 9.99 | (pack of 50) |
| — OR —- | ||||
| Kadrick 420Pcs M3 M4 M5 Threaded Inserts Assortment Kit | https://amzn.to/42JmZ9E | 15.99 | ||
| 1/4-20 Heat Set Insert | 5 | https://amzn.to/4ig8xKN | 8.69 | (pack of 50) |
| M6x40 Hex Head Screws | 3 | https://amzn.to/3WTBBzB | 9.99 | (pack of 20) |
| 4mm Bearing Balls | 6 | https://amzn.to/3CWZlvE | 5.49 | (pack of 50) |
| M6 Hex Nuts | 3 | https://amzn.to/3WTBBiW | 5.99 | (pack of 50) |
| m5x20 socket head cap | 7 | https://amzn.to/42Jnh0e | 8.54 | (pack of 50) |
| m5x30 socket head cap | 6 | https://amzn.to/40VAUXs | 8.99 | (pack of 50) |
| m3x18 socket head cap | 4 | https://amzn.to/40UDE7G | 7.99 | (pack of 50) |
| m5x3 set screw | 4 | https://amzn.to/3CL0Kp5 | 5.99 | (pack of 30) |
| Compression Spring,304 Stainless Steel,9mm OD,1.2mm Wire Size,9mm Compressed Length,35mm Free Length | 4 | https://amzn.to/3QNvLwe | 9.39 | (pack of 10) |
| m5x14mm socket head cap | 4 | https://amzn.to/41beBgA | 7.69 | (pack of 30) |
| m5 Acorn Cap Nut | 3 | https://amzn.to/3Db8Asi | 6.99 | (pack of 25) |
| Fender Washer, 1/4″x1-1/2″ | 1 | https://amzn.to/41EJ7kq | 6.85 | (pack of 50) |
| M5-0.8x20mm set screw | 3 | https://amzn.to/424AakA | 6.59 | (pack of 20) |
| Optional But Suggested | ||||
| NEEWER 9″/230mm Rail Bar Vixen Style Dovetail Plate | 1 | https://amzn.to/4ibQ6GU | 24.64 | |
| SVBONY SV165 Mini Guide Scope 30mm | 1 | https://amzn.to/418VUeR | 53.99 | |
| 3M Scotch-Weld Epoxy Adhesive DP420 | 1 | https://amzn.to/3WWE9wJ | 45.61 | |
| CNBTR Dispenser for 50ml 1: 1/1: 2 AB Cartridges Plastic Tubes | 1 | https://amzn.to/3CLykv8 | 18.61 | |
| Permatex 80050 Clear RTV Silicone | 1 | https://amzn.to/3WTF1lG | 5.98 | |
| SVBONY Red Laser Collimator | 1 | https://amzn.to/4hOFv4I | 22.09 | |
| Sharpstar 2″ 0.95x Reducer / Coma Corrector | 1 | https://bit.ly/4gubg1S | 199 | |
| SVBONY SV226 Telescope Filter Drawer | 1 | https://amzn.to/4gD0Flj | 42.99 | |
| Optolong 2″ L-Enhance Dual Narrowband Light Pollution Filter | 1 | https://amzn.to/41bg1Jr | 215.8 | |
| Astromania 2″ IR/UV Blocking Filter | 1 | https://amzn.to/3EzOJn5 | 23.97 | |
| Alstar Astronomical T2-Extension Tube Kit | 1 | https://amzn.to/3WQZWG4 | 23.79 | |
| MeLE Quieter4C Fanless Mini PC | 1 | https://amzn.to/4aVxJnj | 209.99 | |
| GSO 2″ Dual Speed Focuser 10:1 Precision Micro Crayford Style Focuser for Newton reflector | 1 | https://s.click.aliexpress.com/e/_okGjVPk | 109.59 | |
| 2024S GEMINI EAF | 1 | https://s.click.aliexpress.com/e/_oEf60JY | 88.29 | |
| ZWO EAF | 1 | https://bit.ly/42RJnO9 | 149.00 | |
| LC LICTOP GT2 Closed Loop Timing Belt Rubber 2GT 6mm 3D Printers Parts 400 mm | 1 | https://amzn.to/3D1Q8SP | 6.99 | |
| M48 Extension Tube Kit | 1 | https://amzn.to/4buGl4G | 23.33 |
