TAKAHASHI TOA-130NFB REFRACTOR

Starting Price: $7,190.00
Price as Configured: $7,190.00
Brand: Takahashi / SKU: TA-TOK13310
Special Order Item. Please contact us for availability and delivery times.
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TA-TKA31587S - 645 FLT for TOA130
TA-TKA31587S - 645 FLT for TOA130
About This Product

The newly designed 645 flattener features two fully multi-coated lens elements in two groups and provides outstanding correction out to a 60 mm image circle. Being designed specifically for the TOA-130N and TOA-150B, RMS spot diameters of 1 micron on-axis are achieved. At a 30 mm diameter image circle, the RMS spot diameter is 2 microns, and at 43 mm it is 3 microns. Even out to the full diameter of 60 mm, the RMS spot diameter is 5 microns. With these spot sizes, images are nearly aberration on even the newest small pixel sensors.

The flattener is available in two versions, one for the TOA-130N and one for the TOA-150B. Optically, the two versions are identical, with the only difference being the length of the spacer on the camera side of the adapter. Unlike the old 67 flattener, the 645 flattener has an M72 thread on the telescope side, meaning it can be used not only on the TOA-130NFB, but on the TOA-130NS as well.

For the TOA-130N with the included adapter ring (L), the flattener has a male M72 facing the telescope and a female M54 facing the camera. The metal back distance from the M54 thread is 56.2 mm. If you remove the adapter ring (L), the camera can interface with a female M72 thread with a metal back distance of 83.7 mm.

 For the TOA-150 with the included adapter ring (S), the flattener has a male M72 facing the telescope and a female M54 facing the camera. The metal back distance from the M54 thread is 56.2 mm. If you remove the adapter ring (S), the camera can interface with a female M72 thread with a metal back distance of 73.9 mm.

$800.00 each
QTY:  
Price as Configured: $7,190.00
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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.

TOA-130NFB

The TOA-130NFB is a 130 mm apochromatic f/7.7 refractor with a focal length of 1000 mm. It features a retractable lens hood, a 4 inch rack and pinion focuser with a 7:1 fine focuser, and a 360-degree camera angle adjuster. A complete line of flatteners, reducers and extenders are available, including the 67-series flattener, which provides a 90 mm imaging circle.

TOA-130NS

The TOA-130NS is a 130 mm apochromatic f/7.7 refractor with a focal length of 1000 mm. It features a retractable lens hood and 2.7 inch rack and pinion focuser. A complete line of flatteners, reducers and extenders are available, including the 67-series flattener, which provides a 90 mm imaging circle.

Included in the box:

Optical Tube Assembly
CAA TKP30200
Coupling (W) TKP31003
50.8 sleeve TKP00113
Coupling (S) TKP00103
Ocular adapter (31.7) TKP00101
Ocular adapter (50.8) TKP27110
Extension tube (50.8) TKP31112