The L-Pro Filter is the best choice for light pollution suppression and allows astrophotos to be taken of broadband emission objects such as galaxies, reflection nebulae and globular star clusters.

The relentless spread or urbanization and its associated light pollution have become a big problem for all amateur astro photographers around the world. One solution is to purchase a Mono camera but this can be expensive and might also require the purchase of several types of narrowband filters and a filter wheel.

L-Pro is a multi-bandpass filter which offers much better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro remains the best choice for viewing or photographing broadband targets in light polluted areas.

L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects by selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lights such as mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent main emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural areas with heavy light pollution.

L-Pro has a multiple anti-reflective coating on the optical substrate and uses a precision coating based on ion deposition coating technology. This ensures durability and scratch resistance as well as stability on the CWL (central wavelength), which is not affected by temperature changes.

IMPORTANT WARNING: These nebula filters are NOT designed for observation of the Sun. Do not use this filter to look at the Sun as serious eye damage, blindness as well as damage to equipment may result.

Features:

• Professional visual and photographic filter for astronomy
• Improves deep sky nebula constellation photography
• Best choice for broadband light pollution suppression
• Filter diameter: 2 inch
• Connecting thread: M28.5 x 0.6mm (Eyepiece thread 1.25 inch)
• Selected optical glass material
• Spectrum: 380-750nm
• Surface Quality: 60/40 (Refer to MIL-O-13830)
• Fine-optically polished glass to ensure accurate 1/4 wavefront and highest parallelism over the both surfaces
• High transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm&500nm, SII 672nm and H-beta 486nm)
• Precision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)

Whats included:

1. L-Pro filter (2")
2. Dust protection box