Tag Archives :SV503

Why should I choose the SV131 Plossl eyepiece set?

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! ...

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$Difference Between APO & Achromatic Lens Under Diffraction Ring doloremque$

Test the APO and Achromatic, make sure the difference under diffraction ring, SV305 doublet is quality achromatic lens with SPL-51 ED glass. ...

Read more SV503 Doublet, APO, SPL-51, Achromatic Lens