Vixen FL55SS Telescope Optical Tube Assembly (OTA)
The Vixen FL55SS Telescope Optical Tube Assembly is a highly compact photo-visual refractor designed to deliver outstanding optical performance. Featuring a premium fluorite apochromatic lens, this portable telescope minimises chromatic aberration to produce incredibly sharp images with minimal colour bleeding.
Key Features
- Premium 55mm fluorite apochromatic objective lens with multi-coating for superior clarity and colour correction.
- Short 300mm focal length with a fast f/5.5 aperture ratio, ideal for wide-field views.
- Extremely lightweight and portable design, weighing just 1.5kg with a physical length of 282mm.
- Supplied with a slide bar M, featuring built-in 1/4-inch and 3/8-inch tripod sockets for easy mounting on standard photo tripods or astronomical mounts.
- Highly versatile system compatible with optional high-resolution eyepieces or dedicated photographic corrective lenses for full-frame sensors.
Whether you are observing planetary details or capturing stunning deep-space astrophotography, this telescope offers exceptional optical versatility. Its travel-friendly dimensions make it the perfect grab-and-go companion for astronomers and astrophotographers alike.
Fluorite lens
A fluorite lens with less chromatic aberration is used to create a sharp image with less color bleeding.


Vixen standard Arimizo, equipped with camera tripod screw
Equipped with slide bar M. It can be mounted as it is on a stand with Vixen standard Arimizo such as AP series and SX series. Equipped with 1/4 inch and 3/8 inch screws. It can be mounted on a commercially available camera tripod.
Compatible with finder (sold separately)
Equipped with screws compatible with the Arimizo finder pedestal (sold separately). Compatible with the separately sold finder (finder legs).

Compact photo visual lens barrel
A very compact photo visual lens barrel equipped with a fluorite lens.
In combination with the high-resolution HR series eyepiece, it demonstrates high visual performance despite its small aperture and short focus. Especially when observing the moon and planets, you can get a higher-grade powerful image.
It can also be used as a high-performance astro camera by using a dedicated flattener lens and reducer lens (sold separately) together. It creates a sharp image over the entire field of a full-frame SLR camera.
Lens barrel
| Effective diameter of objective lens | 55mm / Fluorite Apochromat / Multi-coating |
| Focal length (aperture ratio F) | 300mm (F5.5) |
| Resolution / limit grade | 2.11 seconds, 10.5, etc. |
| Condensing power | 62 times the naked eye |
| Size / weight | Length 282mm (without extension tube) Outer diameter 80mm 1.5kg |
| Finder | Arimizo type pedestal (sold separately) can be installed |
Eyepiece
| Parts mounting size | Screwed in / 60mm, 43mm, 36.4mm inserted / 31.7mm |
| Eyepiece (31.7mm diameter) | 31.7mm diameter eyepiece (sold separately) can be used |
Other
| Plates, bands, etc. | Slide bar M |
| photography | Enlargement, direct focus, compact digital camera (colimate) shooting possible * A separate camera adapter etc. is required |
| Sun observation | Can be used in combination with the solar projection plate A set (sold separately) (fits, but the weight balance cannot be perfectly adjusted.) |
| Gross weight | 1.5kg (by eyepiece) |
Brand: Vixen |
Code: VX26201
APN: 4955295262014 |
Supplier Code: 26201
Supplier Description: FL55SS OTA
Brand: Vixen |
Code: VX26201
APN: 4955295262014 |
Supplier Code: 26201
Supplier Description: FL55SS OTA
At a glance
The Vixen FL55SS Telescope Optical Tube Assembly is a highly compact photo-visual refractor designed to deliver outstanding optical performance. Featuring a premium fluorite apochromatic lens, this portable telescope minimises chromatic aberration to produce incredibly sharp images with minimal colour bleeding.
Key Features
- Premium 55mm fluorite apochromatic objective lens with multi-coating for superior clarity and colour correction.
- Short 300mm focal length with a fast f/5.5 aperture ratio, ideal for wide-field views.
- Extremely lightweight and portable design, weighing just 1.5kg with a physical length of 282mm.
- Supplied with a slide bar M, featuring built-in 1/4-inch and 3/8-inch tripod sockets for easy mounting on standard photo tripods or astronomical mounts.
- Highly versatile system compatible with optional high-resolution eyepieces or dedicated photographic corrective lenses for full-frame sensors.
Whether you are observing planetary details or capturing stunning deep-space astrophotography, this telescope offers exceptional optical versatility. Its travel-friendly dimensions make it the perfect grab-and-go companion for astronomers and astrophotographers alike.
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