Sky-Watcher 2" O-III Filter

95,00

O-III line filter in 2 inch: only the oxygen lines at 496 and 501 nm, for maximum nebula contrast in widefield eyepieces and the 2-inch light path.

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Sky-Watcher 2-inch O-III Filter: The Veil Nebula in widescreen

This O-III line filter exclusively transmits the two oxygen lines at 496 and 501 nm, the light in which planetary nebulae and supernova remnants shine. The rest is blocked, making faint structures appear against a deep black background.

Skywatcher OIII 2-inch O-III line filter in black aluminum mount with purple glass, side view.

Skywatcher OIII transmission curve graph with narrow pass at 496 and 501 nm and background light suppressed.

Especially in combination with a 2-inch wide-field eyepiece on a large Dobson, O-III truly comes into its own: the entire Veil Nebula in a single view is a classic. Recommended for apertures of approximately 150 to 200 mm and up.

Features

Line filter: transmits only 496 and 501 nm
Ideal with 2-inch widefield eyepieces at large apertures
Multi-coated, aluminum mount

Compatibility

Screws into the filter thread of 2-inch eyepieces and accessories. Suitable for visual and photographic use.

Specifications

Type	O-III line filter
Mount	2 inches
Steeping material	Aluminum
Use	Visual and photographic
Central wavelengths	496 to 501 nm

The disassembly of Sky-Watcher is a base that will last you for years. Unsure which mount is best for your telescope and your goals? Contact us, we'd be happy to help you decide.

Additional information

Weight	0,12 kg
Dimensions	13 × 12 × 5 cm
Filter application	Moon & planets
Filter type	OIII
Suitable for f-ratio	Universal
Filter size/thread	2 inches

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