Tag Archives :SV503
The journey of refractors
- Nov 09,2021
- Tyson
- 0 Comments
- Telescope
We are dedicated to making fine refractors for all amateur astronomers all over the world. ...
Why should I choose the SV131 Plossl eyepiece set?
- Oct 09,2021
- Cindy
- 0 Comments
- Eyepieces
I take many pictures of the SV131 eyepiece set and test the optical quality. If you are hesitant to buy them or not, watch this blog! ...
Difference Between APO & Achromatic Lens Under Diffraction Ring
- Mar 20,2020
- svbony
- 0 Comments
- Telescope
Test the APO and Achromatic, make sure the difference under diffraction ring, SV305 doublet is quality achromatic lens with SPL-51 ED glass. ...