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Nebula Filter H-Alpha 2-inch 12nmFeatures High quality Explore Scientific H Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial light More contrast and details for all urban astrophotographers Passband bandwidth: 12 nm H alpha filters can only be used for astrophotography Ideal for use near cities with a slightly brightened sky Also blocks almost all light from mercury and sodium vapor lamps Many of the red glowing emission nebulae are

the compact binocular features superior Bak-4 prisms and fully multi-coated lenses to maximize the brightness potential of the 25mm aperture

Note: This item will not power the PMC-Eight systems

All G600 ED binoculars have a streamlined roof prism design and are waterproof and purged with an inert gas to create an internal environment that is impervious to fog and contamination from dirt and debris

No mess digital board with controls and a quick erase button

Red-dot finder

a flat and sharp image field is advantageous and offers a particularly impressive viewing experience even during the day

Optical Type Porro

62 lumens / 4m or nearer (red color) Built-in battery Rechargeable lithium-Ion Polymer battery 600mA Lighting hours (at 20 deg

which features precise tracking with a P-PEC function and STAR BOOK TEN control system

7 mm Maximum load capacity 5 kg Warranty

Knowing when to ventilate

In-app encyclopedia provides additional details about planets and constellations

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