Portaball 18 inch f/4.5
We will be adding more information soon regarding the addition of the 18" f/4.5 Portaball to the Mag 1 product line.
Contact us for more information.
Specifications
| Sphere size & composition | 29 inch Diameter Seamless Fiberglass |
| Upper tube assembly construction | 22 inch O.D. Laminate composite |
| Trusses | 1.5 inch O.D. anodized aluminum |
| Base | Circular composite with PFA bearing |
| Optics manufacturer | Zambuto Optical Co. |
| Aperture | 18 inches |
| Focal Ratio | f/4.5 |
| Primary mirror thickness | 1.625 inches, in removable cell |
| Secondary size (minor axis) | 3.1 inches |
| Secondary obstruction (diameter) | 17%(minimal diffraction) |
| Size and type of focuser | 2 inch Starlight Instruments |
| Finder | Quik Finder by Rigel Systems |
| Eyepiece height at zenith | Custom fit to your eye height, 62 inches min. |
| Weight of heaviest component | ~ 90 pounds |
