ZenithStar 61ii
William Optics
From $548.00
2 stores
In stock
The William Optics ZenithStar 61ii is a premium portable apochromatic refractor combining exceptional optical performance with extreme portability. Featuring Ohara FPL-53 synthetic fluorite glass with fully multi-coated optics, it delivers sharp, high-contrast images with minimal chromatic aberration across visual and astrophotography applications. The f/5.9 focal ratio and 41mm image circle make it ideal for wide-field deep-sky imaging with DSLR and astronomy cameras, while its compact 2.15kg form factor and retractable dew shield enable convenient travel and backyard observing sessions.
Specifications
| Highest magnification | 122 |
| Coating | SMC multi-coating |
| Optics type | Refractor |
| Focal length | 360 mm |
| Aperture | 61 mm |
| Focal ratio | f/5.9 |
| Optical design | Air-Spaced Doublet Apochromat |
| Image Circle | 41 mm |
| Focuser Travel | 75 mm |
| Weight | 2.15 lb |
| Focuser Speed | 10:1 Dual Speed |
| Glass Type | FPL-53 Synthetic Fluorite |
| Focuser Type | 2 inch Rack & Pinion |
| Tube Length (Fully Retracted) | 250 mm |