Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.
William Optics Fluorostar 91 (aka FLT-91) SG / space grey OTA (SKU: T-FLT-91)
19673.89 kr net price (non-EU countries)
Anatolii Livashevskyi
Product Manager
/ 
+48721808900
+48721808900
+48721808900
[email protected]
Description
William Optics Fluorostar 91 Refractor Telescope - Space Grey
The William Optics Fluorostar 91 is a state-of-the-art optical instrument meticulously engineered for astrophotography enthusiasts. It delivers exceptional image quality that sets it apart from other telescopes in its category. Crafted with precision and premium materials, this refractor boasts an impressive Strehl coefficient of over 0.95, ensuring superb optical performance.
At the heart of this telescope is an apochromatic triplet optical system, featuring lenses made from high-quality glass, including the renowned FPL-53 glass from Ohara, Japan. The glass has an Abbe number of 94.49, indicating minimal dispersion. All lenses are equipped with a multi-layer anti-reflective coating to enhance sharpness and contrast.
The Fluorostar 91 is designed to accommodate both full-frame and APS-C sensor cameras, making it a versatile choice for astrophotographers. Its generous illumination disc diameter ensures complete sensor coverage.
Key Features of the William Optics Fluorostar 91 Refractor:
- Apochromatic Triplet: Made from FPL-53 glass with a multi-layer anti-reflective coating for exceptional color correction and minimal chromatic aberration.
- CNC-Machined Mountings: Precision-engineered fasteners ensure a stable and secure setup.
- William Optics Patented Bahtinov Mask Design: Features a convenient handle for precise focus in astrophotography.
- Full Illumination Circle: Offers complete coverage of a full-frame sensor.
Technical Specifications:
- Optical System: ED-APO Apochromatic Triplet
- Objective Diameter: 91 mm
- Focal Length: 540 mm
- Focal Ratio: f/5.9
- Lens Material: Premium optical glass, including FPL-53 (Ohara, Japan)
- Anti-Reflective Coating: Full Multi-Layer Coating (FMC)
- Strehl's Coefficient: > 0.95
- Full Illumination Circle Diameter: Suitable for full-frame sensors
- Compatible Sensor Sizes: APS-C, Full Frame
- Compatible Photographic Systems (via interchangeable T-rings): Canon EF, Nikon F, Sony E, Pentax, Micro 4/3, Fuji FX
- Focuser: 3.3"
- Eyepiece Type: Rack & Pinion, Dual Speed
- Recommended Flatteners: WO Flat 6A III x0.8, WO FLAT 68 III x1.0
- Finder Foot: Vixen
- Folded Tube Length: 441 mm
- Extended Tube Length: 510 mm
- Tube Weight: 4.2 kg (Total Weight: 5.5 kg)
- Tube Finish: White-Grey (Space Gray)
Included Accessories:
- William Optics Fluorostar 91 Refractor
- Vixen Mounting Plate
- Bahtinov Mask with Mount
- Mounting Bracket
- Transport Bag
- Spacer Tube
Warranty:
The William Optics Fluorostar 91 comes with a 24-month warranty, providing peace of mind for your investment in this exceptional refractor.
Data sheet
Official permits of the Ministry of Development and Technology
Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.