William Optics Fluorostar 91 APO Triplet OTA w/ 3.3" R&P Focuser (T-FLT-91-RP33)
William Optics Fluorostar 91 APO Triplet OTA w/ 3.3" R&P Focuser (T-FLT-91-RP33)
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Why Purchase from All-Star Telescope?
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Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
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Product Description
Astronomers desirous of superb visual and photographic intermediate sized refractor performance will much appreciate the William Optics 91 mm f/5.9 Fluorostar. The FLT 91 employs FPL-53 glass and has an optical design consisting of three elements. ln addition, with STM-coatings enabling superb optical performance, the FLT 91 provides excellent quality that is tough to match.
Recommended Optional Accessories
- T-Mount for
- M4/3
- Nikon
- Canon
- Sony a
- Pentax
- Fuji
- Guiding Scope
- Flattener
- Eye Piece & Prism
- Finder Scope & Ring
- Red Dot Finder
What can I see with a William Optics Fluorostar 91 APO Triplet OTA w/ 3.3" R&P Focuser (T-FLT-91-RP33)?
Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.
Jupiter with
25mm Eyepiece - 22x Magnification
(Sold Separately)
Jupiter with
10mm Eyepiece - 54x Magnification
Sold Separately
Jupiter with
5mm Eyepiece - 108x Magnification
Sold Separately
Moon with 25mm Eyepiece
22x Magnification
(Sold Separately)
Moon with 10mm Eyepiece
54x Magnification
Sold Separately
Moon with 5mm Eyepiece
108x Magnification
Sold Separately
Andromeda with 36mm Eyepiece
15x Magnification
Sold Separately
Andromeda with 25mm Eyepiece
22x Magnification
(Sold Separately)
Andromeda with 10mm Eyepiece
54x Magnification
Sold Separately
What's in the Box
Specifications
| Focal Length: | 540mm |
| Diameter: | 91mm |
| Aperture: | f/5.9 |
| Camera Format: | Full Frame DSLR Mirrorless CMOS CCD |
| Focuser: | Dual Speed 3.3" R&P Focuser |
| Image Circle: | > Full Frame |
| Recommended Flattener: | FLAT 6A III |
| Tube Length: | 441mm (Fully Retracted) 510mm (Fully Extended) |
| Tube Weight: | 4.165 Kg |
| Interchangeable T-Mount: | Canon EF, RF Nikon F, Z Sony E Pentax K Micro Four Thirds Fuji X |
Note: William Optics uses high quality steel lens cells and FPL53 glass for WO triplet series (GT and FLT) - this combination is perfect for temperature compensation and will prevent pinched optics in cold weather conditions.
Before you store the telescope you have to uncover it and let the tube to stay open for some time. After the telescope dry up, moisture will evaporate and it can be safely stored. You must to store your telescope in a dry place with a constant room temperature.
Otherwise lens cell will rust and lens coating will be damaged by fungus.
