TeSeek D203F750 Paraboloidal Primary Mirror + 70mm Secondary Mirror for DIY Newtonian Reflecting Telescope Objective

Description:
- There is a centre mark pasted on the primary mirror, which is the core reference point for adjusting the optical axis of the Newtonian telescope. It facilitates the use of optical calibration eyepieces or laser calibration eyepieces to adjust the optical axis after lens installation.

Specifications:
- Primary mirror aperture: 203mm
- Primary mirror focal length: 750mm
- Precision: 1/6λ
- Coating: aluminum plus protective film

Package Included:
- 1 x Primary Mirror
- 1 x Optional Secondary Mirror