HomeStore

Fluorostar 91

Product image 1
Product image 2
Product image 3
Product image 4
Product image 5
Product image 6
Product image 7
Product image 8
Product image 9

Fluorostar 91

Fluorostar 91

A precision-engineered apochromatic triplet refractor designed for discerning astronomers and astrophotographers. This mid-sized telescope features a 91mm aperture with FPL-53 glass, delivering sharp, high-contrast images and an impressive Strehl ratio exceeding 0.95.

Equipped with user-centric features, the FLT91 includes an integrated saddle handle, a 360º field rotator, a dual-speed 3.3" Rack & Pinion focuser, and a 2" Rotolock system. These enhance usability and provide stability for both visual and photographic applications.

Astrophotographers will find the built-in Bahtinov mask invaluable for achieving perfect focus effortlessly. Compatible with the Flat 6AIII, Flat 68III, and Ultra Flat 91, the FLT91 allows precise back-focus adjustments.

Constructed with William Optics' signature quality, the FLT91 is both lightweight and durable, weighing 4.2 kg and 5.6 kg fully equipped. It comes with a soft carry case for easy transportation and protection.

Ideal for capturing celestial phenomena, the William Optics FLT91 is a top choice for those seeking advanced optical performance in a portable package.

Select Color
From $699.30

Original: $1,998.00

-65%
Fluorostar 91

$1,998.00

$699.30

Product Information

Shipping & Returns

Description

A precision-engineered apochromatic triplet refractor designed for discerning astronomers and astrophotographers. This mid-sized telescope features a 91mm aperture with FPL-53 glass, delivering sharp, high-contrast images and an impressive Strehl ratio exceeding 0.95.

Equipped with user-centric features, the FLT91 includes an integrated saddle handle, a 360º field rotator, a dual-speed 3.3" Rack & Pinion focuser, and a 2" Rotolock system. These enhance usability and provide stability for both visual and photographic applications.

Astrophotographers will find the built-in Bahtinov mask invaluable for achieving perfect focus effortlessly. Compatible with the Flat 6AIII, Flat 68III, and Ultra Flat 91, the FLT91 allows precise back-focus adjustments.

Constructed with William Optics' signature quality, the FLT91 is both lightweight and durable, weighing 4.2 kg and 5.6 kg fully equipped. It comes with a soft carry case for easy transportation and protection.

Ideal for capturing celestial phenomena, the William Optics FLT91 is a top choice for those seeking advanced optical performance in a portable package.

You may also like

-65%
Thumbnail 1Thumbnail 2

Cat 61 WIFD

$1,098.00

$384.30

-65%
Thumbnail 1Thumbnail 2

Pleiades 68 Astrograph

$1,998.00

$699.30

-65%
Thumbnail 1Thumbnail 2

Pleiades 111 Astrograph

$3,798.00

$1,329.30

Thumbnail 1Thumbnail 2

Cat 51 WIFD

$798.00

-65%
Thumbnail 1Thumbnail 2

Gran-Turismo 81 WIFD

$1,998.00

$699.30

-65%
Thumbnail 1Thumbnail 2

Zenithstar 81 WIFD

$999.00

$349.65

-65%
Thumbnail 1Thumbnail 2

Zenithstar 61 II

$498.00

$174.30

Thumbnail 1Thumbnail 2

Gran-Turismo 71 II

$933.00

-65%
Thumbnail 1Thumbnail 2

Cat 71 WIFD

$1,498.00

$524.30

-65%
Thumbnail 1Thumbnail 2

Gran-Turismo 81 IV

$1,568.00

$548.80

-65%
Thumbnail 1Thumbnail 2

Fluorostar 132

$4,378.00

$1,532.30