Optolong L-Para 2" 10nm narrowband nebula filter for H-Alpha and O-III

The L-Para is a new narrowband nebula filter for astrophotography for telescopes and telephoto lenses from f/2.

H-Alpha and O-III are passed through almost unhindered - bandwidth approx. 10 nm
The filter also allows passage in the H-Beta range
The areas of light pollution are blocked, so successful deep-sky photography is also possible from near cities
The distinctive nebula color (RGB) is preserved as best as possible for a natural impression
There is no annoying halo effect even with bright stars
The precise passband and steep flanks mean that the filter can also be used with high-speed optics
Supplied in a plastic transport box

Optolong L-Para - narrowband nebula filter for H-Alpha and O-III

The new L-Para nebula filter from Optolong offers the highest standard for astrophotography with color cameras and mono cameras. High-contrast nebula images can be taken even from near cities. Problems with reflections from bright stars are a thing of the past with this filter.

The L-Para is a narrow-band (10nm bandwidth) nebula filter with transmission in the O-III and H-Alpha range. The transmission is over 85%, even with very bright optics from an aperture ratio of f/2. The filter reliably blocks disruptive emission lines from mercury lamps, sodium vapor lamps and LED lamps, the main causes of light pollution. In addition, the filter has excellent contrast and anti-halo properties.

L-Para is suitable for all common telescopes and telephoto lenses, from the bright RASA and Hyperstar telescopes, to well-known telephoto lenses such as the Samyang 130mm f/2, strong APO refractors and all Newton telescopes to RC telescopes for the highest resolution.

Filter size: 2" mounted
Passage O-III: 10 nm at 500.7 nm
Passage H-Alpha: 10 nm at 656.3 nm
Height of the mount: 5 mm without external thread, 7 mm with M48 external thread
Substrate: high-quality optical glass (Schott)
Surface: Finely optically polished
Coating: Multi-coating
Filter type: Dual bandpass filter
Filter thickness: 2 mm
Bandwidth: 10 nm
Transmission: more than 85%

Optolong filter
Plastic transport box and storage box