£59.00
| /
Grey filter with 13%, 25% and 50% transmission. If you want to observe the moon with large aperture telescopes, you will usually need a relatively dark moon filter, so sufficient absorption is present with very large apertures. These filters are recommended starting from an aperture of 200mm, and especially with 250mm or above.
ND = Neutral Density %
Lumicon filters use ND as a light transmission percentage. ND13 is hence equivalent to a 13% light transmission, ND25 to a 25% light transmission and ND50 to a 50% light transmission. So, for example, an ND25 filter allows more light to pass through than an ND13.
Capacity |
|
Connection (to the telescope) | 1,25" |
Colour | neutral grey |
Transmission | 13, 25, 50% |
Mount material | Aluminium |
Coating of optical system | multiple |
Frame | 1,25" |
General |
|
Type | Filters |
Type of build | neutral density filter |