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Sestante Davis Mk15

 

 

I sestanti prodotti dalla Davis sono tra i pių apprezzati sestanti di plastica in produzione. In particolare il modello Mk15 ha prestazioni che si avvicinano notevolmente ai pių costosi modelli in metallo. Costruito dalla californiana Davis Instruments č costituito da una struttura in materia plastica resistente al salino ed agli urti con  un'ottica molto  curata ed un nonio a tamburo di notevole precisione.

 

Ecco le caratteristiche (prima dell'unboxing "fotografico" del mio Mk15):

 

  • Large, easily adjusted mirrors using new instrument-quality glass and a special baked on salt-spray resistant backing. Both mirrors have protective housings.

  • Horizon mirror is half-silvered. No adjustment wrenches required.

  • Molded of high-impact, weather-resistant plastic. All Davis Master Sextants feature the following professional specifications: 7" (178 mm) frame radius. Graduation 120° to -5°

  • Index mirror rectangular, 1.98" x 1.49" (50 x 38 mm).

  • Precision machined slow travel gear and worm mechanism.

  • Highly visible, easy-to-read micrometer drum and vernier allowing readings to 2/10 minute of arc.

  • Fully ribbed, three-circle sextant body for platform strength and stability.

  • Large, contoured handle designed for sure, steady grip and angled back for added control.

  • Seven large sunshades allow complete, independent adjustment of shading density for horizon and index mirrors.

  • 3 x 27 mm star telescope with anti-reflective coated glass lenses, plus separate hooded sight tube for glare-free sun shots.

  • Neck lanyard frees hand and protects sextant.

  • Tough, fully padded, shock-resisting carrying case with compartments for extra mirror kits.