Ian says
"The Takahashi FSQ106 is one of the most versatile instruments available, effectively offering four telescopes in one package.
It can be used at its native focal ratio of F5, but with the addition of the Takahashi 0.73x Focal Reducer, it becomes a fast F3.6 astrograph.
Further, by using the Takahashi 0.6x Focal Reducer, the FSQ106 works at a blazingly fast F3 focal ratio.
And, with the addition of the Takahashi 1.6x Extender, the FSQ106 becomes an F8 instrument.
The FSQ106 is more than just an excellent astrograph. It also delivers very sharp, high-contrast views for planetary observation and sharp stars across the whole of the eyepiece field for beautiful, rich-field observations."
About this product
Model: tak_tqe10641
Part Number: TQE10641
Takahashi FSQ106-EDX f/5 Quadruplet Petzval Apochromat Refractor
This is the telescope most imaging refractors want to be when they grow up!
Quadruplet Petzval Design
The modified Petzval design of the FSQ-106ED, with field-flattener integrated into the tube, makes it possible to cover all the photographic formats from 35mm SLR/DSLR to 6x7 cameras!
No other 4" refractor offers the same 88mm diameter imaging circle (field of 9,5°). Can be used with large sensors without risk of vignetting or loss of definition in edge of field.
The objective is entirely collimateable so mechanical and thermal stresses can be adjusted out, should it ever be necessary (we advise the telescope be returned to Takahashi for collimation).
New 4" Focuser
This latest model FSQ106-EDX IV is fitted with a newly designed heavy-duty 4" rotatable focuser with an integrated camera angle adjuster. It will lift up to 11 lbs, and hold it there without slipping!
It also includes a micro-edge fine focuser for precise focus adjustments. Combine that with a 2" or 1.25" eyepiece adapter and you'll be prepared to tackle any operation.
Takahashi manufacture their own focuser and Aluminium castings and adjust them individually for consistent, high quality.
The EDX IV features 178mm of back focus to enable easier assimilation of accessories such as filter wheels and off axis guiders.
The package option includes Tube Holder, 6x30 Finderscope and Bracket.
The spot-diagrams of the FSQ-106ED are eloquent. At prime focus, at the edge of the field (nearly 44mm of the optical axis) the stars remain sharp. The QE-Reducer (F/3,6) specifically designed for this telescope retains the high optical performance.
Telescope Field of View Simulator
Mechanical Drawing
- Tube length (min/max): 580mm/675mm (with standard accessories)
- Tube diameter: 125mm
- Tube weight: 7kg
System Charts
.pdf)
What's in the box
OTA Only Includes:
- FSQ-106EDX4 OTA
- TKP38003 Coupling n° 8L for focal reducer
OTA Package Includes:
- FSQ-106EDX4 OTA
- TKA00551 6x30 Finder
- TKA00563 Finder bracket
- TKA29420S Tube holder with aux. balancing plate
- TKP38003 Coupling n° 8L for focal reducer
Specifications
| Spec. | FSQ-106ED |
| Optical design | Modified Petzval quadruplet apochromat |
| Aperture | 106 mm |
| Standard |
| Focal length | 530 mm |
| Focal ratio | F/5.0 |
| Resolution | 1.09" |
| Limiting magnitude | 11.8 |
| Light grasp | 220x |
| Image circle | 88 mm |
| Photo field | 9.5° |
| Back focus | 186.38 mm |
| Metal back | 178 mm |
| With Extender-Q 1.6x |
| Focal length | 850mm |
| Focal ratio | F/8 |
| Image circle | 44 mm |
| Photo field | 3° |
| Metal back | 117.5 mm |
| With QE-Reducer |
| Focal length | 385mm |
| Focal ratio | F/3.6 |
| Image circle | 44mm |
| Photo field | 6.5° |
| Metal back | 72.2 mm |
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