Cytron Japan Dual BP Filter Bandpass 48mm (Dual Filter)

---------------------------------------------------------------------- 【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. ----------------------------------------------------------------------

Filter size: 48mm Country of origin: Japan Thread diameter: 48mm Thread pitch: 0.75mm Filter thickness: 1.5mm A dual bandpass filter is an interference filter that transmits wavelengths around the two main emission lines emitted by celestial bodies, Hα and OIII, and cuts other wavelengths. Since it cuts wavelengths other than those near the 2 emission lines, it can be expected to have a strong light pollution cutting effect, making it useful for high-contrast nebula photography such as narrowband photography. ●2 emission line transmission type By transmitting mainly the wavelength range near the two main emission lines (Hα, OIII) emitted by celestial bodies and cutting out the other wavelength range, nebulae can be seen even in light-polluted areas. In particular, for OIII, the 495.6nm and 500.7nm emission lines are transmitted to improve the visibility of OIII. ●Highly versatile 48mm/American size diameter The highly versatile filter thread diameter is 48mm and American size, so it can be used with many telescopes. ●Reliable domestic quality. Adopts synthetic quartz glass Synthetic quartz glass is used for the substrate. It is stronger and has better heat resistance than commonly used optical glass, so distortion during coating is smaller than usual, and it has excellent deposition stability and surface precision. ■Notes■*It may not be possible to install depending on the telescope or lens. *The characteristics of this product depend on the incident angle of the light beam. To ensure proper performance, we recommend using it with a telephoto lens or telescope. When using a wide-angle lens, the brightness and color balance will be uneven on the screen. *Please use commercially available image processing software to adjust the color balance of the images you have taken. *Product specifications may change without notice. Thank you for your understanding.