Takahashi TSA-102S O.T.A.


  • Newly designed triplet apochromat TSA Series
  • Very high color correction, produces color-free images
  • Airline portable less than 23" long and weighs 11 lbs.
  • 2.7" focuser for stable focusing, will accommodate heavy CCD cameras or bino viewers
  • Enhanced back focus of 230mm [9.39] allows the use of any bino viewer with ease
  • Supplied with rigid 72mm r extension tubes to assure deflection free focusing
  • Knife edge baffles and over sized tube produce very high contrast images


The TSA-102S is the first in the new TSA line of Takahashi triplet apochromats. The color free images produced will delight the lunar, planetary and deep sky observer with very high contract images with pin point stars.

The compact size, less than 23" with the lens shade retracted, makes the TSA-102S the perfect airline ready apochromat. The TSA-102S is great for eclipse expeditions or transport to remote sites.

Not only is the TSA-102S a great visual instrument, it can be converted into a flat field f/7.84 or an f/5.98 wide field imaging platform for a CCD camera or digital SLR. The addition of the optional camera angle adjuster allows the image to be rotated 360 degrees without loss of focus. The camera angle adjuster is also very handy for visual applications to position the ocular or bino viewer in the best most comfortable position.

The TSA-102S is a compact, high quality, apochromatic, versatile Takahashi, made for the refractor enthusiast who wants a very high quality instrument in a relatively compact package.

SPECIFICATIONS for the TSA-102S (Tube assembly only)

Aperture102mm r
ObjectiveNew design triplet apochromat
Focal RatioF/8
Focal Length816mm
Back Focus 230mm [9.39"]
Diameter of Main Tube114mm r
Length of Main Tube lens shade collapsed585mm [23"]
Weight of Main Tube5kg [11lbs.]
Focuser Size68.6mm [2.7"]
Packingtriple carton [maximum protection]


TOA Reducer
Focal RatioF/5.98
Focal Length610mm
Image Circle 53mm q @ 5
Stellar Image at Center8 :

TOA Flattener 35

Focal RatioF/7.84
Focal Length800mm
Image Circle 42mm q @ 3
Stellar Image at Center12 :

Add to Cart:

  • Model: TSA0102
  • Shipping Weight: 37lbs
  • Manufactured by: Takahashi

This product was added to our catalog on Tuesday 21 February, 2006.

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