Takahashi TOA-130NFB Triplet Refractor OTA

$6,990.00

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Specifications:

Aperture: 130mm

Focal Length: 1000mm

Focal Ratio: f/7.7

Back Focus: 256mm

Tube Length: 812mm

Tube Diameter: 155mm

Tube Weight: 22 pounds

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SKU: TA_TOK13310 Categories: , , Tags: , , , ,

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.

Tripod and accessories not included

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