ZWO - Narrowband 31mm Filter Set

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Narrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.


SKU: ZWO-NB7nmD31
Manufactured by:
ZWO
 

Product Description

ZWO Narrowband 31mm Filter Set

Narrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

It can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Name: ZWO narrowband 31mm filter
Size: D=31mm
Thickness: 2mm

The ZWO H-Alpha filter has a 7nm bandpass and passes light at a 656nm wavelength and light transmission comes up to 80% rate. Excellent choice for high-contrast imaging and revealing rich details of nebulae when in a light polluted area.

The ZWO S-II narrowband filter has a bandpass of 7nm and passes light at 672nm wavelength. It is a good choice for visual observation on emission and planetary nebulae as well as supernova remnants. It can be used with the H-Alpha and OIII narrowband filters for tricolor CCD imaging.

The ZWO O-III narrowband 7nm filter is geared for nebulae observation on a centered 500nm wavelength which is the OIII emission light. This allows the user to see more of the nebulae from light polluted skies then RGB will be able to show.

Specifications

Name ZWO - Narrowband 31mm Filter Set
Manufacturer ZWO
UPC 0713831221550
Model ZWO-NB7nmD31

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