William Optics

William Optics Fluorostar 91 APO - Red

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Your Price: $2,494.99
SKU:
T-FLT-91RD-RP33
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Product Overview

William Optics Fluorostar 91 Triplet Refractor

This beautiful 91mm f/5.9 APO triplet refractor is decked and ready to ride on your telescope mount! Whether you want to do visual astronomy, astrophotography, terrestrial observation or wildlife photography, this the scope for you! The FLT91 is designed form the optics down for a quality experience. The optics are housed in a steel lens cell and consist of three elements (triplet) made of fully multi-coated Ohara FPL-53 glass. Contrast, clarity and virtually colour-free results will boost your visual and astro-imaging to a new level.

Technical Specifications

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
Gold
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

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