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SKY ROVER Banner Cloud APO 15x56 Binoculars Waterproof Binoculars with ED Glass for Stargazing
$568.74
SKY ROVER Banner Cloud APO 12x56 Binoculars Waterproof Binoculars with ED Glass for Stargazing
$559.03
SKY ROVER Banner Cloud APO 12x50 Binoculars Waterproof Binoculars with ED Glass for Stargazing
$502.67
D203F750 Paraboloidal Primary Mirror DIY Astronomical Newtonian Reflective Telescope Objective Lens
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.
Specification:
- Primary mirror aperture: 203mm
- Primary mirror focal length: 750mm
- Precision: 1/6λ
- Coating: aluminum plus protective film
Package Included:
- 1 x Primary Mirror
