TAKAHASHI TOA-130NS REFRACTOR

TAKAHASHI SKU: TOK13010

$7,200.00

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The TOA series is a member of Takahashi’s line of triplet refractors.  In the TOA design, three lens elements are used, with the front and rear constructed from ED glass.  The resulting system achieves a high level of apochromatic performance for both visual observation and imaging.  Takahashi engineers have a undertaken a complete redesign of the triplet system, completely eliminating spherical aberration while minimizing axial chromatic aberration in the visible light spectrum.

 

In typical apochromatic designs, the elimination of chromatic aberration is usually at the expense of increasing spherical aberration at various wavelengths.  However, with the TOA series, the focal shift across the entire visible spectrum from 436 nm up to 656 nm is less than +/- 0.01 mm.  This is less than 1/100 the aberration of a typical apochromatic design.

 

DESCRIPTION

The Triplet Ortho-Apochromat concept of the TOA refractors makes it possible to combine sharpness and extraordinary contrast. This unique optical formula, based on a highly air-spaced ED triplet, has the advantage of completely eliminating spherical aberration while having the best chromatic correction in the Takahashi telescopes range. TOA excels in both high planetary resolution and deep sky imaging, fully exploiting the capabilities of cameras with the largest sensors.

The NS version of the TOA-130 is equipped with a conventional 69 mm diameter rack-and-pinion focuser and a retractable dew shield. A balancing ring is provided to compensate for the weight of the lens cell. In photography, the mounting of the optional TOA-35 FL field corrector offers a consistent image circle of 40 mm. There is also a focal reducer (TOA-35 RD) with a coefficient of 0.7x.

 
CHARACTERISTICS

Takahashi TOA-130NS refractor

 
CHARACTERISTIC TAKAHASHI TOA-130NS REFRACTOR
Optical design ED Triplet Ortho Apochromat
Lens cell Highly air-spaced triplet. 3 lenses/3 groups. 2 x S-FPL53 ED lenses.
Coatings Hard multicoatings
Diameter 130 mm
AT PRIME FOCUS
Focal length 1000 mm
Focal ratio F/7.7
Metal back distance 222.5 mm
WITH TOA-35FL FIELD CORRECTOR
Focal length 980 mm
Focal ratio F/7.5
Image circle diameter 40 mm
metal back distance 117.5 mm
WITH TOA-35RD FOCAL REDUCER
Focal length 698 mm
Focal ratio F/5.4
Image circle diameter 44 mm
Metal back distance 62.5 mm
WITH EXT-ED1.5X FOCAL EXTENDER
Focal length 1500 mm
Focal ratio F/11.5
Image circle diameter 44 mm
Metal back distance 117.5 mm

 

CHARACTERISTIC TAKAHASHI TOA-130NS REFRACTOR
Length of the optical tube 1145 mm (1012 mm with retracted dew shield)
Diameter of the optical tube 156 mm
Diameter of the dew shield 180 mm
Weight 10.5 kg
Focuser Rack-and-pinion 2.7''

Spot-diagram of Takahashi TOA-130 refractor at prime focus

Spot-diagram of Takahashi TOA-130 refractor with TOA-35FL field corrector

Spot-diagram of Takahashi TOA-130 refractor with TOA-35RD focal reducer

 

Please note: mount, tripod, tube holder and finder sold separately.

 

Included in the box:

Optical Tube Assembly

Extension tube (F) TKP31005

50.8 Sleeve TKP00113

Coupling (S) TKP00103

Ocular adapter (31.7mm) TKP00101

Ocular adapter (50.8) TKP27110

Extension tube (L) TKP31112

 

TOA-130NS System Chart

TOA-130NS Reducer System Chart

TOA-130NS 35 Flattener System Chart

TOA-130NS Extender TOA System Chart

TOA-130NS Reducer System Chart