Takahashi FSQ-106EDX4 Apochromatic Refactor OTA
Astrophotographers see the FSQ-106EDX4 as one of the best astrographs available for amateur astronomers. With a focal length of 530 mm, an image circle of 88 mm and a field of view of 9.5°, it acts as a telephoto lens for the most powerful CCD cameras and digital cameras on the market.
Based on a Quadruplet Petzval optical formula including ED glass, the FSQ-106EDX4 is optimized for wide-field imaging of the deep sky. It has a native flat field, a camera angle adjuster (CAA) and an oversized rack-and-pinion focuser with 1/7 microfocuser. To minimize space requirements, it is equipped with a retractable dew shield.
Two focal reducers (0.73x and 0.6x) are available as options.
Specifications: Takahashi FSQ-106EDX4 Apochromatic Refactor OTA
Characteristic
- Objective: Petzval Quadruplet with ED glass
- Lens cell: Highly air-spaced quadruplet. 4 lenses/4 groups. 2 x S-FPL53 ED lenses
- Coatings: Hard multicoatings
- Diameter: 106 mm
- Length of the optical tube: 675 mm (580 mm with retracted dew shield)
- Diameter of the optical tube: 125 mm
- Diameter of the dew shield: 145 mm
- Weight: 7.0 kg
- Focuser: Rack-and-pinion with 1/7 microfocuser
At prime focus
- Focal length: 530 mm
- Focal ratio: F/5
- Metal Back Distance: 178 mm
With RD QE0.73X focal reducer
- Focal length: 385 mm
- Focal ratio: F/3.6
- Image circle diameter: 44 mm
- Metal Back Distance: 72.2 mm
With 645RD QE0.72X focal reducer
- Focal length: 380 mm
- Focal ratio: F/3.6
- Image circle diameter: 60 mm
- Metal Back Distance: 56.2 mm
With F3RD 0.6X focal reducer
- Focal length: 320 mm
- Focal ratio: F/3
- Image circle diameter: 44 mm
- Metal Back Distance: 56.2 mm
With EX Q1.6X focal extender
- Focal length: 850 mm
- Focal ratio: F/8
- Image circle diameter: 44 mm
- Metal Back Distance: 117.5 mm
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