VegaSpec I
Professional DIY Spectrograph for Astronomy
Do it yourself or buy parts or the complete system! *
*) Manufacturing is currently on hold while we incorporate expert feedback into the design. Stay tuned for the updated version!
Specification
Full Motorized Control:
2" Collimator Lens (Focusing)
50x50mm Grating (Wavelength selection)
Pentax 50mm f/1.4 Objective (Camera focus)
Internal Calibration Unit: Ar-Ne Lamp and Flat-field LED
Optical and Mechanical Details:
Aperture Ratio: Optimized for f/4 (compatible with slower optics for enhanced sharpness)
Slit Wheel: 12 positions from 10μm to 700μm
Gratings: Visual from 300 to 2400 l/mm
UV from 300 to 3600 l/mm
Versatility: Easy-to-swap gratings and quick slit size adjustment.
Connectivity: Integrated ports for Main and Guiding cameras.
Software: Includes VegaSpec Acquire and Control software
Physical Dimensions:
Size: ~ 320mm x 280mm x 130mm
Weight: ~ 2.5kg
Build your own Spectrograph
Documents
All Downloads are free!
Last Update: 2026-04-30
Last Update: 2026-04-30
Last Update: 2026-04-30
Last Update: 2026-04-30
Last Update: 2026-04-30
The Mission
My aim is to foster scientific work within the amateur astronomy community.
Three years ago, I came across Paul Gerlach's ingenious concept of a 3D-printed spectrograph. Fascinated by the design, I built my own version, enhancing it with electronic control for the focusing and calibration unit.
Since I wasn't entirely satisfied with the initial result, I developed VegaSpec I. By utilizing larger optical components, such as a 2" collimator lens, a 50 x 50 mm diffraction grating, and a Pentax 50 mm objective lens, I was able to significantly improve the optical quality. To date, more than 1,000 working hours and significant financial investment have gone into this project.
A Journey of Continuous Improvement
After the initial launch of the VegaSpec I concept, I received invaluable feedback, critical technical notes, and inspiring ideas from the international spectroscopy community. I want to express my sincere gratitude for this engagement.
Science is a collaborative process of trial and error. The recent discussions have highlighted potential areas for optical optimization, particularly regarding light efficiency and compatibility with various telescope designs. To ensure that VegaSpec I meets the high standards required for scientific work, I have decided to pause the manufacturing service for now.
I am currently working on a refined version of the system, incorporating these expert insights. All updates, new CAD data, and optical test results will be published here immediately. I warmly invite fellow experts to continue this dialogue and cooperate in making VegaSpec a robust instrument for amateur astronomy.
I hope that this project will contribute to the advancement of spectroscopy among amateur astronomers.
Project Status: Research, Development & Prototyping
Upcoming Improvements and Roadmap
- Optical Validation: Comprehensive testing of various optical configurations in combination with VegaSpec I to maximize light throughput.
- Enhanced Camera Interface: Redesigning the camera mount for easier and more precise alignment and orientation of the sensor.
- Software Optimization: Ongoing bug fixes and implementation of new automated features for the VegaSpec control suite.
Change Log
- May 2026: Transitioned project status to "Development & Prototyping" for technical refinement.
- May 2026: Initiated design review based on community feedback regarding optical efficiency.
Contact:
For collaboration, technical inquiries, or to join the waiting list:
Current Software Status
Key Features:
- Camera Support: Native driver support for ToupTek cameras and universal compatibility via ASCOM. (Please report any camera-specific issues to help us improve stability.)- Acquisition: Direct spectral recording with support for customizable automated sequences.
- Flexible Control: The spectrograph is fully controllable through the dedicated software. If you prefer using third-party acquisition tools (e.g., N.I.N.A. or SGP), the VegaSpec suite can be used as a standalone controller for the hardware.
- Guiding (In Development): Integration with PHD2 is currently being implemented but is not yet operational.
Continuous Evolution:
The software is under constant development. I highly value community input—please share your suggestions for improvements or new features to help make VegaSpec a more powerful tool for everyone.
3D-Preview
First Light
Sol, 2026, April 18. 2400 l/mm visual
Contact
Useful Links
VEGA 2027 - International Spectroscopy Symposium for Amateurs & Professionals
May 6 - May 8, 2027 - Salzburg - Austria
An international gathering to exchange knowledge between amateur and professional
SpectroCalc2 - Data Reduction Software for Astronomical Spectra
A comprehensive freeware tool designed for the calibration and analysis of astronomical spectra.