Deluxe Mark 25 Sextant
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Deluxe Mark 25 Sextant Overview
? In the full-featured Mark 25 sextant, the conventional half-silvered mirror has been replaced with a full field Beam Converger? mirror, sometimes referred to as a ?full-horizon mirror?, which combines horizon and astrobody images in a single field for easy, reliable sights. A special coating is applied to high quality optical glass to allow the user to see through this mirror, yet still pick up images as faint as low-light stars? Special mineral coating is selective for different wavelengths of light - horizon is transmitted in one color and the star or sun in another? Precision machined slow travel worm gear? Readings to within 12 seconds of arc? Seven sunshades? Light weight and corrosion proof, the Mark 25 is made of an upgraded plastic that is very stable? Arc and drum are illuminated by a long-life LED? Comes with instruction booklet and padded, shock-resistant carrying case
