This is a ND32 Neutral Density lunar filter with 1.5 filter optical density and 3.125% transmittance. This ND filter reduces and modifies intensity of all wavelengths or colours of light evenly, while giving no changes in hue of colour rendition. It is a great filter for glare reduction and is very useful when observing the Moon (digital eyepiece/camera users please see note below).
The filter is made of top quality optical glass and is mounted in a black anodised aluminium holder with M30x0.75mm external threads for the connection of eyepiece barrels.
- ND32 Neutral Density Moon Filter.
- Filter Optical Density: 1.5
- Transmittance: 3.125%
- Built with top quality optical glass.
- Holder external threads: M30x0.75mm, can fit the Plossl 16mm and 32mm eyepieces that are available from this store.
- Built with metal frame.
(1). Some telescope eyepieces may have M28.5×0.75mm internal threads on the eyepiece barrels. In this case, a moon filter adapter is available to attach this moon filter to the eyepiece.
(2). When this moon filter is used with the EE300 digital eyepiece/camera, it can help improve image result under normal daylight conditions or when the moon is not too bright at night (eg. a new moon or Waxing Crescent). However, as the moon is getting bigger and brighter, you would need to use the ND64 filter with the EE300 device.