- Astreya Optical
- Astro-Physics
- ATIK (Imaging Cameras)
- AIP Software (Astronomical Image Processing)
- APM Germany
- Borg
- BT Technologies
- Canon
- Celestron
- Coronado Solar
- Custom Scientific
- Finger Lakes Instruments (FLI)
- Fuji
- Losmandy
- Lumenera Cameras
- Meade
- Nikon
- Orion
- Pentax
- PierTech
- PWT (Particle Wave Technologies)
- Robofocus
- SBIG
- Software Bisque
- SolarScope HA Filters
- Starlight Instruments
- Stellarvue Optics
- Starlight Xpress
- Takahashi
- Televue
- TEC (Telescope Engineering Company)
- TMB
- Vixen
- William Optics
- Zeiss