Eyepiece Projection adapter, needs T-ring

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Consists of three parts for eyepiece projection photography with Takahashi refractors only. The normal 1.25" Takahashi eyepiece holder is unscrewed from the telescope drawtube and replaced by a special compression ring 1.25" eyepiece holder from the TCA-4. A 1.25" eyepiece is inserted into the compression ring (0.965" eyepieces can be used by adding optional 0.965" adapter #TCA9AD) and locked in place by tightening the ring. The TCA-4 body slips over the eyepiece and is in turn locked into place on the compression ring by thumbscrews. An optional T-ring attaches to the telescoping inner tube of TCA-4. The inner tube can be moved in and out of the TCA-4 body to allow the projection distance to be varied from 100mm to 130mm. The projection distance is locked in by thumbscrews on the TCA-4 body. The orientation of the camera can be changed from horizontal to vertical by loosening the thumbscrews at the front of the TCA-4 body, rotating the body to the desired angle, and retightening the thumbscrews. The variable projection distance design allows you to change the magnification to vary the size of the image by 30% without the need to change to a different focal length eyepiece. Needs optional T-ring.
Projection Distance:
100mm
Warranty:
5 years
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Takahashi TCA-4 system chart 52 KB
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Helpful Formulas
Eyepiece Projection formula
Enter Your Telescope & Eyepiece Information:
Your Telescope Focal Length:    mm
Your Telescope Focal Ratio: f/
Your Eyepiece Focal Length:    mm
  
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Takahashi - Eyepiece Projection adapter, needs T-ring

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Takahashi - Eyepiece Projection adapter, needs T-ringImage showing the three separate components of the TCA-4.
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Our Product #: TCA-4
Manufacturer Product #: TFP0310
Price: $317.95  FREE ground shipping - Click for more info
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MSRP: $342.50
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Consists of three parts for eyepiece projection photography with Takahashi refractors only. The normal 1.25" Takahashi eyepiece holder is unscrewed from the telescope drawtube and replaced by a special compression ring 1.25" eyepiece holder from the TCA-4. A 1.25" eyepiece is inserted into the compression ring (0.965" eyepieces can be used by adding optional 0.965" adapter #TCA9AD) and locked in p . . .





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