All Levenhuk Ra Filters
Levenhuk Ra filters come in very useful when trying to stargaze under urban illumination conditions. These filters are capable of suppressing most of the city lights, making skies darker and enhancing the contrast of observed objects.
This filter was designed for observations of dim and low-contrast deep-sky objects. The passband includes the Hß wavelength (4861 Å) and the OIII doublet (4959 Å and 5007 Å). Some planetary and emission nebulae are emitt...More
Levenhuk Ra CLS 2'' filter is capable of enhancing the contrast of observed nebulae and other deep-sky objects, which will be very useful for those who often stargaze in the city. It suppresses up to 90% of city lights, ...More
Levenhuk Ra O-III 2'' filter is a narrow-passband filter with a barrel diameter of 2'' that transmits wavelengths of the visible spectrum within 150 Å (15 nm) range. This filter suppresses all light that lies outside its...More
Levenhuk Ra UHC 2'' filter is a great accessory for deep-sky observations under urban illumination conditions. This filter has a 0.92 transmittance, which means that it suppresses up to 92% of city lights and greatly enh...More