The Vespera Dual Band Filter is a dual narrowband filter that will significantly improve your photo quality whether you are viewing from an urban or a dark sky environment.
By only allowing light which are very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in deepspace nebulae, the filter will increase the contrast between the object and the sky background. Therefore, using it makes it possible to obtain a higher-quality image, with sharper stars and finer details.
Keep only the essential:
The Dual Band filter has been designed to allow only two particular wavelengths of light to pass through to the Vespera sensor:
– O-III
– H-alpha
Due to the filtered wavelengths, it is particularly effective for photographing nebulae in emission (e.g.: Orion nebula M42, Heart nebula IC 1805 etc.), dark nebulae endowed with hydrogen (e.g.: Horsehead or Elephant’s Trunk nebula etc.), planetary nebulae (e.g.: Owl nebula M97, Dumbbell nebula M27 etc.), supernova remnants (e.g.: Veil nebula, Crab Nebula etc.).
For globular clusters (e.g.: Hercules cluster M13, cluster M92…), the selectivity of the Dual Band filter will help you to obtain sharper stars.
A filter specifically researched for Vespera:
The optical quality of the Dual Band filter has been specifically studied by Vaonis engineers to offer use at full aperture, without any impact on the optical diameter of the instrument. The lens ring is equipped with an electronic microchip that allows Vespera to detect the Dual Band filter and automatically adapt its observation and image processing parameters accordingly.
Transmission curve:
The filter features 12nm of bandwidth in each wavelength (O-III = 500.7nm, H-alpha = 656.3nm).
Whats included:
- Vespera Dual Narrowband Filter
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