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Telescope Engineering TEC APO 140 f/7 Tripelt Apochromat

The TEC APO 140 has a number of features that in a given combination are rarely found in one scope:
  • Precision apochromatic objective with modern coating that makes lenses almost invisible
  • Oiled and fully sealed lens triplet, for fastest thermal adaptation and minimum of haze and reflections
  • Retractable baffle
  • Light tube assembly
  • FeatherTouch 360° rotatable focuser with coarse and fine focusing
  • Collet type eyepice holder
  • Line of accessories, including: Precision tube rings with adjustable latches, Dovetail plate (same width and fit as Losmandy plates), Finder bracket with new principle of finder adjustment, Choice of two kind of cases.
Korrigiert von 436- bis 1000 Nanometer. Optimiert für die e-Linie bei 546 nm
  • APO140 is an Aplanatic Oiled Triplet refractor with ED glass (FPL-53) as a middle element.
  • The color correction is optimized for visual use with focus shift less than 0.02% from 436nm to 1000nm. Calculated Strehl for e-line (546nm) is 0.99.
  • Intereferometry of the first run lenses showed that the average Strehl is close to calculated with a very smooth wave front and RMS less than 1/50. air-spaced objectives. The outside surfaces of front and rear lenses are coated with 7 layers of antireflective coating, that reduce light reflection to the average 0.25% in range of 400-700nm.

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