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FSQ-85EDX

The FSQ-85EDX is a more mobile version of the FSQ-406EDX4 for lovers of wide-field deep sky imaging.
Description

The FSQ-85EDX is a more mobile version of the FSQ-406EDX4 for lovers of wide-field deep sky imaging.

Like its predecessor, it is based on an apochromatic Petzval quadruplet formula including ED glass. With a focal length of 450 mm and a flat field covering 5.6 degrees over the sky, this refractor is ideal for photography. It is delivered with a 1.01X corrector to make the most of recent sensors with smaller and smaller pixels. The image circle is 44 mm.

The rack-and-pinion focuser is deliberately oversized to improve accuracy and efficiency. It is controlled by a double system of 1/7 ratio wheels and equipped with a CAA (Camera Angle Adjuster) for photographic framing. The retractable dew shield saves space.

A focal reducer is available as an option to transform the telescope into a true high-end 328 mm astronomical telephoto lens, open at 3.9, with a 7 degree field of view on the sky and a 40 mm image circle!

Characteristics
Optical characteristics
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 85 mm
At prime focus
Focal length 450 mm
Focal ratio F/5.3
Metal Back Distance 197.5 mm
With 1.01X field corrector
Focal length 455 mm
Focal ratio F/5.4
Image circle diameter 44 mm
Metal Back Distance 56.2 mm
With RD QE0.73X focal reducer
Focal length 327 mm
Focal ratio F/3.8
Image circle diameter 44 mm
Metal Back Distance 72.2 mm
With EX ED1.5X focal extender
Focal length 680 mm
Focal ratio F/8
Image circle diameter 44 mm
Metal Back Distance 117.5 mm
Mechanical characteristics
Length of the optical tube 623 mm (535 mm with retracted dew shield)
Diameter of the optical tube 95 mm
Diameter of the dew shield 114 mm
Weight 3.6 kg
Focuser Rack-and-pinion with 1/7 microfocuser

Spot-diagram of Takahashi FSQ-85EDX refractor with 1.01X field corrector

Spot-diagram of Takahashi FSQ-85EDX refractor with RD QE0.73X focal reducer

Spot-diagram of Takahashi FSQ-85EDX refractor with EX ED1.5X focal extender

Documentation

System-charts

System-chart of Takahashi FSQ-85EDX refractor Télécharger
System-chart of Takahashi FSQ-85EDX refractor with RD QE0.73X Télécharger
System-chart of Takahashi FSQ-85EDX refractor with EX ED1.5X Télécharger

Instruction manual

Instruction manual of Takahashi FSQ-85EDX refractor Télécharger

Available configurations

FSQ-85EDX refractor

Reference : [TQE08540]
[TKA00551] - Finder 6x30
[TKA00562] - Finder bracket for 6x30 finder
[TKA21420S] - Cradle 95S with balancing plate
[TQE08541] - FSQ-85EDX refractor OTA

FSQ-85EDX refractor OTA

Reference : [TQE08541]

FSQ-85EDX refractor
FSQ-85EDX refractor
FSQ-85EDX refractor OTA
FSQ-85EDX refractor OTA