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This Page Updated 21st October 2016
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TAKAHASHI
FSQ-106ED |
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What is the FSQ-106ED
The FSQ·l06ED is a flat-field f/5 imaging visual Astrograph:
the successor to the legendary FSQ·106, employs a modified
advanced Pelzval design of four elements in 4·group, two of
which are ED (extra low dispersion) glass to provide
superior color correction.
Improved Color Correction
As a result of using two high performance ED glass
elements, and by positioning the G3 element close to the G2
element, the FSQ106ED has dramatically Improved correction
for colour and spherical aberration. The new design corrects
colour for over a wide range from the near ultra-violet to
the near infra-red, 400nm to 1000nm. This makes the
FSQ-l06EO the perfect imaging platform.
Improved Illumination
The new design increased the size of the G3 element
by 50% and placed it closer to the G2 element. The result is
an increase in field illumination of 20% for a 35mm frame,
33% for a 70mm Ø image circle and a
34% for the 88mm Ø image circle; a great improvement
over the standard Petzval design.
Improved High Magnification
The new Extender-Q 1.6X(50.8/2") was designed to
take advantage of the new Capabilities of the FSQ-106ED
design. The new 50.8mm (2") five-element corrector,
flattener, and extender increases the focal length from
530mm f/5 to 850mm f/8 flawlessly. The correction provided
by the Extender-Q 1.6X (50.8/2") allows the highest possible
magnification to be used. The 30% increase in color
correction provided by the Extender-Q 1.6X (50.8/2")
produces diffraction limited images at high and low
magnification
Reducer-QE 0.73X
This newly designed f/3.6 dedicated reducer for the
FSQ-160ED is a 4-element in 3-group 0.73X accessory. The
Reducer-QE 0.73X maintains the same high level of color
correction and field flatness produced by the FSQ-106ED at
its native f/5 focal ration. It was designed to be used with
digital SLR's and CCD cameras.
Enhanced Back Focus
The FSQ-160ED has been designed with a back focus
of 178mm. This enhanced back focus will allow the imager or
observer to use any combination of CCD camera, bino-viewer
or diagonal with their FSQ-106ED. The standard accessories
include a prime focus tube, compression ring 50.8mm(2") and
31.7mm (1.25" adapters for maximum flexibility. |
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FSQ-106ED Technical Specifications |
Optical System |
Flat-Field Advanced Petzval Quadruplet |
Aperture |
106mm |
Focal Length |
530mm |
Focal Ratio |
f/5 |
Photographic Field |
9.5° |
Image Circle |
Ø
88mm |
Resolving Power |
1.09" |
Limiting Magnitude |
11.8 |
Light Gathering Power |
229X |
Diameter of Main Tube |
125mm |
Total Length of Main Tube |
675mm (Lens Shade Extended) |
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580mm (Lens Shade Retracted) |
Weight of Main Tube |
7.0kg (15.4lbs) with Finder |
Finder Scope |
7x50 6.3° (illuminator acceptable) |
Back Focus |
186.38mm |
Metal Back |
178mm |
with
Extender-Q 1.6X |
Effective Focal
Length |
850mm |
Effective Focal Ratio |
f/8 |
Image Circle |
Ø
44mm |
Photographic Field |
9.4° |
Metal Back |
117.5mm |
with
Reducer-QE 0.73X |
Effective Focal Length |
387mm |
Effective Focal Ration |
f/3.6 |
Image Circle |
Ø
44mm |
Photographic Field |
6.5° |
Metal Back |
72.2mm |
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TAKAHASHI FSQ-106ED Instruction Manual -
CLICK HERE |
Photo/Visual System System Chart PDF -
CLICK HERE |
Extender-Q 1.6X System Chart PDF -
CLICK
HERE |
Reducer-QE 0.73X System Chart -
CLICK HERE |
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The above images and information and gathered from
various online sources
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