Fluorostar 120 in Space Gray: triplet with lanthanum glass
The William Optics Fluorostar 120 Space Gray delivers a calm, clear, and true-to-color image. The triplet lens made of FPL-53 and lanthanum glass keeps stars point-like without chromatic aberration: double stars appear beautifully separated, and cloud bands and ring structure are immediately noticeable on Jupiter and Saturn.
Lots of light for deep-sky and planets
The 120mm aperture at a 780mm focal length (f/6.5) captures a lot of light: short exposures for nebulae and galaxies, and enough resolution for serious planetary work, visually and photographically. The Losmandy dovetail securely mounts the tube on a medium-duty equatorial mount, the Vixen/Sky-Watcher accessory shoe accepts the guidescope, and the Bahtinov mask makes focusing precise.
In the box
- Optical tube Fluorostar 120/780 triplet, Space Gray
- Losmandy-style dovetail
- Handle
- Vixen/Sky-Watcher accessory shoe
- Bahtinov mask
- Padded transport bag
Featured accessories
The William Optics Flat68III flattener (€869) levels the field to full-frame; a UniGuide 50mm guidescope (from €189) enables long exposures.
For whom yes, for whom no
Good for: serious astrophotographers and visual observers looking for a large triplet that can handle both disciplines. Not for: anyone looking for a more compact travel scope; the Fluorostar 91 or the ZenithStar 81 WIFD are more manageable in that case.
Specifications
| Optical design | Apochromat, FPL-53 triplet with lanthanum glass |
| Opening | 120 mm |
| Focal length | 780 mm |
| Opening ratio | f/6,5 |
| Attachment | Losmandy-style dovetail with handle |
| Accessory shoe | Vixen/Sky-Watcher |
| Focus assist | Bahtinov mask |
| Execution | OTA (loose tube), Space Gray |
Unsure about the right tube for your camera and mount? The telescope selection aid helps you choose. Also view all Refracting telescopes and the full range of William Optics.
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