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) RD / red OTA (SKU: T-FLT-91RD-RP33)
8334.32 zł net price (non-EU countries)
Anatolii Livashevskyi
Product Manager
/ 
+48721808900
+48721808900
+48721808900
[email protected]
Description
William Optics Fluorostar 91 Apochromatic Refractor Telescope - Red OTA
The William Optics Fluorostar 91 is a state-of-the-art apochromatic refractor telescope, expertly crafted for astrophotography enthusiasts. Known for its remarkable image clarity and precision, this telescope is engineered to eliminate optical defects, providing you with a superior viewing and imaging experience. With meticulous design and the finest materials, this telescope boasts a Strehl coefficient of over 0.95, reflecting its exceptional optical performance.
Central to the Fluorostar 91 is its apochromatic triplet optical system. The lenses are crafted from premium materials, including FPL-53 glass from the esteemed Japanese manufacturer Ohara. This glass features an impressive Abbe number of 94.49, ensuring minimal chromatic aberration. Additionally, each lens is treated with a multi-layer anti-reflective coating, delivering sharp, high-contrast images.
The generously sized illumination disc makes the Fluorostar 91 an excellent choice for use with full-frame sensor cameras and APS-C DSLRs, ensuring complete coverage and outstanding image quality.
Key Features of the William Optics Fluorostar 91 Refractor:
- Apochromatic triplet optical system featuring FPL-53 glass with multi-layer anti-reflective coatings.
- Precision CNC technology for secure and stable mounting.
- Includes William Optics patented Bahtinov mask with a convenient handle for easy focusing adjustments.
- Full illumination circle suitable for full-frame cameras.
Technical Specifications:
- Optical System: ED-APO apochromatic triplet
- Objective Diameter: 91 mm
- Focal Length: 540 mm
- Aperture: f/5.9
- Lens Material: FPL-53 glass (Ohara, Japan)
- Coating: Full multi-layer coating (FMC)
- Strehl Coefficient: > 0.95
- Illumination Circle Diameter: Suitable for full-frame sensors
- Compatible Sensor Sizes: APS-C, full frame
- Photographic Systems Compatible (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 (fully compatible for full-frame sensor corners)
- 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: Red
Kit Components:
- William Optics Fluorostar 91 refractor
- Vixen mounting plate
- Bahtinov mask with mount
- Mounting bracket
- Transport bag
- Spacer tube
Guarantee:
The William Optics Fluorostar 91 comes with a 24-month warranty, providing peace of mind and assurance in the quality of your purchase.
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.