ZWO Narrowband 2" NB7nm Set of Three Filters (HSO, SKU: ZWO NB7nm2)

ZWO Narrowband 2" NB7nm Set of Three Filters (H-Alpha, O-III, S-II)

Elevate your astrophotography to new heights with our premium set of three narrowband filters, meticulously crafted to unveil the splendor of nebulae, even in areas plagued by light pollution. These filters, boasting a half-width of 7 nm, dramatically enhance the contrast between celestial wonders and the night sky, empowering you to capture breathtaking color images.

This comprehensive kit includes three indispensable filters:

• Hydrogen Filter (H-Alpha Band): Perfect for capturing the red hues of hydrogen-rich regions.
• Oxygen Filter (O-III): Ideal for capturing the blue-green tones of oxygen-emitting celestial bodies.
• Sulfur Filter (S-II): Essential for recording the deep reds of sulfur emissions.

Together, these filters enable the creation of the acclaimed Hubble palette, mapping sulfur emissions to the red channel, hydrogen to the green, and oxygen to the blue, bringing out the vivid colors of the universe in your images.

Key Features of the Filters:

• Full Width at Half Maximum (FWHM): 7 nm +/- 0.5 nm
• Glass Thickness: 1.85 mm +/- 0.03 mm
• Wave Front Accuracy: 1/4 λ
• High Transmission Efficiency: Approximately 90% for the 656 nm (H-alpha), 672 nm (S-II), and 500 nm (O-III) lines
• Minimal Transmission Outside Range: <0.1%
• Infrared Cutoff: 700 - 1100 nm range
• Multi-Coated (MC): For optimal performance and durability
• Filter Holder Length: 5.5 mm + 3.5 mm thread
• Thread Specifications: M48 * 0.75
• Size: 2 inches

Incorporate these narrowband filters into your astrophotography arsenal to capture awe-inspiring images of emission nebulae, planetary nebulae, and supernova remnants, even under challenging light-polluted skies. Don't let artificial light impede your astronomical adventures—unlock the full potential of your imaging gear with our dependable and versatile narrowband filters.