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William Optics
Fluorostar
Fluorostar 91 APO Red
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Fluorostar 91 APO Red
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5
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5
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Your Price:
$2,494.99
William Optics Fluorostar 91 APO Red
Part Number:
T-FLT-91RD-RP33
Availability:
0 Back Order
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Nikon 48mm T-Ring [+$35.00]
Canon 48mm T-Ring [+$35.00]
Canon R 48mm T-Ring [+$45.00]
Nikon Z series [+$45.00]
Sony E Mount 48mm T-Ring [+$45.00]
Flat-6AIII -0.8x Reducer [+$335.00]
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Description
Customer Reviews
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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Average Customer Ratings
5.0
Excellent optics
Absolutely incredible for astrophography. First light image attached. Thanks Ontario telescope and William optics for outstanding service and products.
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Reviewed by:
(Verified Buyer)
Ken
from NL on 6/23/2021
5
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