William Optics Fluorostar 91 with 3.3" Rack & Pinion Focuser - Specify Color
| Article number: | T-FLT-91XX-RP33 |
| Availability: | More on the Way to us |
| Delivery time: | Special Order |
William Optics Flourostar 91 with 3.3" Rack & Pinion Focuser - Available in Red, Gold, and Space Gray.
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
- 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
Nice mid-sized scope with some phenomenal views thru it. I got this scope due to its size and weight. I was looking for something larger than 80mm, but still light in weight. This scope was perfect. It fits beautifully on my iOptron GEM45 and provides me with the focal length I was looking for. The stock focuser is very smooth and is very fluid in motion while providing a nice weight and the ability to lift heavier cameras. If you are looking for a mid-size refractor, I would definitely look at this scope.
