William Optics 1.25" 90-deg Erecting Prism Diagonal with Helical Focusing
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All New 90 degree high quality erecting prism with helical focuser barrel.
Another beautiful product exclusively from WO.
This 1.25" 90 deg. erecting prism will be very happy to be used with that nice premium refractor of yours! Perfect for daytime observations too.
Precision Prism
- Image erecting BAK4 prism with anti-reflection coating.
- High accuracy and high light reflection prism.
- Helical focusing on the top barrel for fine  adjustment.
Superior Craftsmanship
- Internally matte blackened and threaded for no internal stray light reflection.
- Threaded for 1.25" filters.
- Helical focuser has 15mm of focus travel.
Beautiful Finish
- Entirely aluminum, black anodized.
- Smooth finish.
Specifications
- Clear aperture = 20.2mm
- Weight = 6.5oz
Other Information
- Country of Manufacture: Taiwan
All New 90 degree high quality erecting prism with helical focuser barrel.
Another beautiful product exclusively from WO.
This 1.25" 90 deg. erecting prism will be very happy to be used with that nice premium refractor of yours! Perfect for daytime observations too.
Precision Prism
- Image erecting BAK4 prism with anti-reflection coating.
- High accuracy and high light reflection prism.
- Helical focusing on the top barrel for fine  adjustment.
Superior Craftsmanship
- Internally matte blackened and threaded for no internal stray light reflection.
- Threaded for 1.25" filters.
- Helical focuser has 15mm of focus travel.
Beautiful Finish
- Entirely aluminum, black anodized.
- Smooth finish.
Specifications
- Clear aperture = 20.2mm
- Weight = 6.5oz
All New 90 degree high quality erecting prism with helical focuser barrel.
Another beautiful product exclusively from WO.
This 1.25" 90 deg. erecting prism will be very happy to be used with that nice premium refractor of yours! Perfect for daytime observations too.
Precision Prism
- Image erecting BAK4 prism with anti-reflection coating.
- High accuracy and high light reflection prism.
- Helical focusing on the top barrel for fine  adjustment.
Superior Craftsmanship
- Internally matte blackened and threaded for no internal stray light reflection.
- Threaded for 1.25" filters.
- Helical focuser has 15mm of focus travel.
Beautiful Finish
- Entirely aluminum, black anodized.
- Smooth finish.
Specifications
- Clear aperture = 20.2mm
- Weight = 6.5oz
Other Information
- Country of Manufacture: Taiwan
William Optics 1.25" 90-deg Erecting Prism Diagonal with Helical Focusing