This model has many great features including seven large sunshades, a 3 mm x 27 mm star scope, and easy-to-read micrometer drum vernier scale that reads to 2/10 of a minute. The Mark 15 has a 7" (18 cm) frame radius graduated from 120 degrees to -5 degrees and comes with a traditional half-silvered mirror.

Large, easily adjusted mirrors using new instrument-quality glass and a special baked on salt spray resistant backing. Mirrors have protective housing. Horizontal mirror is half silvered. No adjustment wrenches required.
Moulded from high impact, weather resistant plastic.

• 7" (178mm) frame radius
• Graduation from 120 degrees to -5 degrees
• Index mirror rectangular, 1.98" x 1.49" (50x 38 mm)
• Precision machined slow gravel gear and worm mechanism
• Highly visible, easy to read micrometer drum and vernier allowing readings to 2/10 minute if arc.
• Fully ribbed, three circle stxtant body for platform strength and stability
• Large, contoured handle designed for steady grip and angled back for added control
• Seven large sunshades allow complete, independent adjustments 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 batteries and mirror kits. Manufacturer offers a one year warrenty (for full details on warrenty please contact Davis Instruments USA).