Takahashi TOA-130NS Optical Tube with 2.7" Focuser

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-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.

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. 

Optical Tube Assembly only (mount, tripod, tube holder and finder sold separately).

Telescope Specifications  

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

The newest Takahashi refractor, the triplet TOA-130, is the first of the new Ortho-Apochromat Series.

This 21st century innovation employs a newly designed triplet using special elements to produce the highest order of color correction, hence the name Ortho-Apochromat and is packaged in a short 32° tube with the lens shade retracted.

This instrument will be offered with the classic 2.7° focuser. For those wanting to use a medium format camera, we will offer a deluxe 4° focuser with built-in camera angle adjuster. This focuser, coupled with the dedicated flattener, will produce a fully illuminated 70mm circle with a usable 92mm diameter.

The high order of color correction of the Ortho-Apochromat Series produces images with saturated color and thanks to the numerous knife-edged baffles, an image with amazing contrast.

The TOA-130 is perfect for visual, CCD and photo imaging. The f/7.7 focal ratio with a 1000mm focal length is long enough, using the LE-ED 2.8mm Takahashi ocular, for high magnification observations of the Moon and planets and yet will produce a 2.5° field at 20x when used with the Takahashi flat field LE-50 2° ocular.

Ample back focus, over 200mm from the rear cell, has been designed in to permit the user to use a variety of CCD cameras, color filter wheels and electronic focusers or film cameras.

Product Numbers:
- TSA0130 - TOA-130NS with 2.7in. focuser
- TSA0131 - TOA-130NFB with 4in. focuser

SPECIFICATIONS for the TOA-130 (Tube assembly only) - TOA-130NS with 2.7in. focuser*

*Also available with a 4in. focuser on the TOA-130NFB