Achromatic Series
Diameter: 152mm.
Focal ratio: F/5.9.

ED Series
Objective lens structure: doublet, with a piece of ED glass.
Diameter: 70mm - 102mm.
Focal ratio: F/6 - F/7.

ED Pro Series
Objective lens structure: doublet, with a piece of super ED glass.
Diameter: 60mm - 150mm.
Focal ratio: F/6 - F/8.

EDT Series
Objective lens structure: triplet, with a piece of ED glass.
Diameter: 80mm - 152mm.
Focal ratio: F/6 - F/8.

APO Series
Objective lens structure: triplet, with a piece of super ED glass.
Diameter: 70mm - 155mm.
Focal ratio: F/6 - F/8.

Astrophotography Series
Objective lens structure: with at least 1 piece of super ED glass.
Diameter: 60mm - 130mm.
Focal ratio: F/5.

If you want to know more information about the products, please contact us by email.