SVBONY SV220 Telescope Filter H-Alpha/OIII 3nm Dual-Band 2 Inch Narrowband Filter 3nm Ha/OIII

The SV220 dual narrowband filter features a cutoff wavelength range of 300-1050nm and an average OD5 cutoff performance, effectively reducing stray light and light pollution and improving image clarity. With a bandwidth of 3±1nm, celestial details are vividly displayed. Extremely low halo coating provides sharp, high-contrast images. Available in 1.25-inch and 2-inch sizes, it is ideal for capturing deep-sky objects.

・[Average OD5 Cutoff Performance] The SV220 employs average OD5 cutoff technology, achieving a low transmittance of 0.001% within the 300-1050nm range. It significantly suppresses stray light and light pollution, greatly improving the signal-to-noise ratio and making images purer and clearer, particularly suitable for deep-sky observation. ・[Ultra-Low Halo Coating] Adopting an ultra-low halo multi-layer coating design, it blocks excess light, reduces glare and flare, and enhances image contrast and color accuracy while ensuring clear and detailed celestial images, allowing you to capture the vivid details of the night sky. ・[Full-Frame Compatible Design] The SV220 is designed specifically for full-frame astrophotography camera sensors, minimizing vignetting during wide-angle shooting and ensuring uniform brightness and clarity from center to edge, significantly improving the integrity of images of vast star fields and nebulae. ・[3nm Narrowband Precision Filtering] The SV220 3nm dual narrowband filter features a narrow 3±1nm bandwidth, accurately filtering most background stray light to emphasize the characteristics of the target celestial object, highlighting celestial details and improving the suitability and effectiveness of observation and photography. ・[High Light Transmission] With a peak transmittance exceeding 85% for the SV220 dual narrowband filter, deep-sky objects can be quickly captured even in light-polluted urban environments. High light transmission reduces exposure requirements, doubles shooting efficiency, and captures celestial details clearly. ・[High Light Volume Suppression] The SV220 effectively suppresses light damage and is suitable for bright observation scenarios such as balconies in urban areas and suburbs. Optimized for OSC color cameras, it allows you to directly obtain high-contrast, low-noise deep-sky images without the need for monochrome cameras or filter wheels, significantly reducing shooting thresholds and complexity. ・[Two Sizes Available] The SV220 covers a wavelength range from 300-1050nm, from ultraviolet to near-infrared, accommodating various celestial observation scenarios and providing flexible and comprehensive spectral support. It is available in two sizes: 1.25 inch (M28.5×0.6) and 2 inch (M48×0.75), adapting to a wide range of astronomical instruments. ・[Suitable Telescope] The SV220 dual-band filter is not suitable for smart telescopes or astronomical telescopes with a focal ratio of f/4 or less. ・[Professional Optics Manufacturer] [SVBONY] is committed to providing cost-effective optical products to everyone. Products are sold well in many countries around the world. It comes with a 6-month service from the date of purchase. We strive to be a company you can trust. We will always respond in Japanese within 24 hours, 365 days a year.

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device's requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.