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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
William Optics Fluorostar 91

William Optics Fluorostar 91

by William Optics
SKU WO-T-FLT-91SG-RP33
Save 5% Save 5%
$1,998.00 USD
$1,998.00 USD - $1,998.00 USD
$1,998.00 USD
$1,898.00 USD
$1,898.00 USD - $1,898.00 USD
$1,898.00 USD
Price Match Policy!
  • 91mm APO using FPL-53 Glass
  • F/5.9 Fast Focal Ratio
  • Portable and Versatile
Availability:
Backordered
Contact us to know when we will receive our next ones!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Availability:
Backordered
Contact us to know when we will receive our next ones!

Free Shipping in USA

More information

  • Description
  • Specifications
  • In the Box

  • Take your astrophotography to new heights with the William Optics Fluorostar 91, a premium APO refractor telescope designed to capture the beauty of the night sky with unparalleled precision. With its fast f/5.9 focal ratio and advanced optical design, this instrument is perfect for astrophotographers and astronomers seeking to explore the depths of the universe.

    Disclaimer

    Avoid Looking Directly at the Sun:
    Use only with a proper solar filter, such as a front-mounted filter .

    Rotolock

    The Rotolock 2 inch adapter provides for a solid and efficient connection for a WO 2 inch diagonal, and other accessories.

    William Optics Fluorostar 91 Astrophotography Telescope

    New Focuser Knob

    The Fluorostar 91 boasts a larger fit focuser, designed for smooth and precise focusing, allowing you to capture images with ease and accuracy.

    William Optics Fluorostar 91 Astrophotography Telescope

    Convenient and Portable

    William Optics Fluorostar 91 Astrophotography Telescope

    The Fluorostar 91 comes with a soft carry case to make your astrophotography journey seamless:

    • Dovetail plate for secure attachment to equatorial mounts
    • Versatile saddle bar for guiding and easy handling and setup

  • Lens Type

    Apochromatic Triplet Prime Lens

    Focal Length

    540mm

    Diameter

    91mm

    Aperture

    f/5.9

    Focuser

    Dual Speed 3.3" R&P Focuser

    Color

    Red Space grey

    Lens Material

    FPL-53

    Strehl Ratio

    0.95

    Camera Format

    Full Frame DSLR / Mirrorless / CMOS / CCD

    Test Report

    Zygo test report available at additional cost

    T-Mounts Supported

    Canon EF, RF Nikon F, Z Sony E Pentax K Micro Four Thirds (M4/3) FUJI X

    Retracted Length

    441mm

    Extended Length

    510mm

    Extension Tube Length

    40mm

    OTA Weight

    4.165Kg

    Total Weight

    5.575Kg

    Extension Tube Weight

    0.105Kg
    • William Optics Fluorostar 91 APO Refractor Telescope
    • 2" Rotolock Adapter
    • 2" to 1.25" Adapter
    • Soft Carry Case
    • Instruction Manual