Blocks artificial light from mercury and sodium lamps for cleaner night sky images
Preserves natural nebula emission lines for accurate color balance
Multi-band transmission maximizes contrast of emission nebulae
Ultra-thin filter cell ensures compatibility with most filter wheels
Multi-layer anti-reflection coating increases durability and stability
Summarized by Shop
The Optolong L-Pro filter is a light pollution multiband filter designed to reduce the effect of light pollution while offering a great white balance.
CLS, UHC, L-eNhance, L-eXtreme and narrowband filters are very effective in increasing the contrast of emission nebulae but they are ineffective on deep sky objects that have a continuous
Filter Type
Multiband color filter
Glass Thickness
2.0 mm (1.25" and 2" filters), 1 mm
Optical Substrate
Monolithic glass, non-glued
Surface Quality
60/40, MIL-O-13830 compliant
Parallelism
30°
Available Sizes
1.25" and 2" clip-on, EOS full frame, Nikon full frame
Summarized by Shop
5.0
3 ratings
5
4
3
2
1
L Pro filter- great colours
S
Scott · April 23, 2026
Good Filter
Significantly improved nebulosity in nebulae as well as fine detail in galaxies. Only downside is that it reduced the intensity of stars.
R
Russ · April 4, 2026
Works as expected
Cuts light pollution nicely, though gives images a slightly blue or cold look. No awkward side effects such as halos around stars.