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Advantages of the Apo Televid 77 Telescope Objective Lens DesignUnlike most conventional spotting telescope, the Apo-Televid contains a triplet (three) objective lens instead of the two element (achromatic) design. Furthermore, optical and mechanical elements including high grade fluoride glasses with special coatings and extremely precise mounts are incorporated - all created to experience nature in its purest form.
Perfect apochromatic lens design and fabrication results in a level of correction that reduces image aberrations to an imperceptible minimum. This provides the observer with an image rich in contrast and pure in color fidelity.
Especially in difficult light conditions such as a humid overcast day, or when observing at high magnifications, the application of optical glasses with partial anomalous dispersion eliminates annoying (false) color fringes from reaching the human eye. This false color may appear as a fringe or violet halo often seen around a black bird, or even on a dark branch contrasted against the lighter sky. Such false color is typical in lesser achromatic telescopes, especially when operating them at higher magnifications or in poor lighting; this indicates that all available colors do not come to focus - in effect this produces a loss of contrast and detail, color shifts, and resultant loss of apparent brightness.
Such distractions are eliminated in the "apochromat" telescope. The finest structural details are also enhanced, even when contrast is high. In other words, wherever there is a lot of light and shadows.
Leica eyepieces extend the outstanding apochromatic correction all the way to the outermost borders of the image: "Brilliant to the very tips of their wings!".
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