Takahashi - TOA-130 Triplet Ortho Apochromat Optical Tube with 2.7" focuser

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.

TAKAHASHI - TOA-130

SPECIFICATIONS for the TOA-130 (Tube assembly only)
Aperture 	130mm
Focal Length 	1000mm / 754mm w/ reducer
Focal Length w/ flattener 	999mm
Focal Ratio 	F/7.7 / F/5.8 w/ reducer
Focal Ratio w/ flattener 	F/7.68
Image circle 	Ø92mm
Photographic field 	5.3° / 3.8
Finder scope 	7x50 6.3°
Backfocus from end of OTA 	256mm +
Tube Diameter 	155mm / 179 mm w/ dew shield
Tube Length 	812mm w/ adapters removed
Diameter of dew shield 	179mm
Dew shield 	Retractable
Tube weight 	10 kg (22 lbs)