Baader Filters C2 Swan-Band 15nm 1.25″

The Baader Filters C2 Swan-Band 15nm 1.25″ is a unique narrowband filter specifically designed to capture the characteristic C2 Swan emission line around 514 nm. This emission is typical of carbon-rich comets and diffuse nebulae where C2 molecules emit visible light.

The filter allows only a narrow bandwidth of 15 nanometers to pass through, effectively suppressing interfering background light and light pollution. This creates a exceptionally high contrast between the nebula and the dark sky background - ideal for astrophotographers who want to capture the fine structures of gas and dust nebulae.

Thanks to the Baader hard coating technology and the fully parfocalized 1.25″ mount, this filter delivers optimum transmission and long durability without shifting of the central wavelength. The filter glass layers are resistant to moisture, oxidation and scratches, making the filter suitable for intensive use under various conditions.

Application:
The Baader C2 Swan-Band 15nm is ideal for astrophotographers who want to focus on:

• Comet photography with emphasis on the greenish C2 structures.
• Mists with dominant Swan emission bands.
• Deep-sky images where light pollution must be reduced.

The filter is compatible with all 1.25″ filter wheels and adapter rings, and produces the best results with high-sensitivity cameras in the green spectrum.

Specifications:
Filter type: Narrowband filter (C2 Swan-Band)
Wavelength: 514 nm (C2 emission line)
Bandwidth (FWHM): 15 nm
Transmission:>90%
Barrel size: 1.25″
Optically flat glass with hard coating
Parfocal: Yes
Housing: Aluminum, black anodized
Application: comet and deep-sky photography
Light pollution suppression: High
Country of origin: Germany