Explore Scientific Filters SII 12nm 1.25" (77343)

The Explore Scientific SII 12nm 1.25" filter is designed for observing and photographing specific types of nebulae and other deep-sky objects. This filter allows light at the wavelength of 672 nm to pass through, which corresponds to the emission line of ionized sulfur. It's particularly useful for enhancing the visibility of planetary nebulae, emission nebulae, and supernova remnants, especially in light-polluted areas. The filter effectively blocks artificial light and other wavelengths, significantly improving contrast and revealing details that might otherwise be invisible.

Specifications

Capacity

• Central wavelength: 672 nm

• Half-value width: 12 nm

• Frame: 1.25"

• Mount material: Aluminium

• Coating of optical system: Multiple

• Connection (to the telescope): 1.25"

General

• Type: Filters

• Type of build: Line filter

Area of Application

• Useful for photographs: Yes

• Visually useful: Yes

• Twin stars: No

• Moon & Planets: No

• Nebulae & galaxies: Yes