The abbreviation L-RGB stands for Luminance, Red, Green and Blue. These filters are specially designed for astrophotography use. For creating a colour image with a black-and-white camera, an exposure is made through each filter. These are then combined on the computer to form a coloured combined image. The inclusion of the L-filter increases the contrast.
Using a colour camera eliminates the need for such filter sets, but only a black-and-white camera can take full advantage of the chip's resolution and also allows the use of line filters.

Baader
Filters UV/IR L CMOS 1.25"
$ 71.00
ready for shipping in 24
h

Astronomik
Filters Luminanz L-2 2" UV-IR blocking filter
$ 140.00
ready for shipping in 24
h

Astronomik
Filters Luminanz L-2 UV-IR blocking filter, 1.25"
$ 75.00
ready for shipping in 24
h

Astronomik
Filters Luminanz L-2 EOS-Clip UV-IR blocking filter
$ 104.00
ready for shipping in 24
h

Meade
Filters RGB Color Filter Set 1,25"
$ 130.00
ready for shipping in 24
h

Omegon
Filters Pro 1.25'' LRGB filter set
$ 209.00
ready for shipping in 24
h

Chroma
Filters U-Bessel 1,25"
RRP:
$ 580.00
Our price:
$ 401.00
ready for shipping in 3-5
weeks

Baader
Filters LRGB CMOS 2"
$ 540.00
ready for shipping in 1-2
weeks

Omegon
Pro 2'' LRGB filters
$ 319.00
ready for shipping in 24
h

Optolong
Filters LRGB Filter-Set 2"
RRP:
$ 401.00
Our price:
$ 346.00
ready for shipping in 24
h

Astronomik
Filters Luminanz L-1 2" UV-IR blocking filter
$ 151.00
ready for shipping in 3-7
days

Optolong
Filters Clip Filter for Nikon Full Frame L-Pro
( 1 / 5 )
RRP:
$ 303.00
RRP:
$ 303.00
Our price:
$ 259.00
ready for shipping in 3-7
days

ZWO
Filters Filter-Set L-RGB for camera ASI 1600 MM Mono 1,25"
RRP:
$ 216.00
Our price:
$ 192.00
ready for shipping in 24
h

Astronomik
Filters L-RGB 2"
$ 640.00
ready for shipping in 3-7
days

Optolong
Filters Clip Filter for Canon EOS APS-C L-Pro
RRP:
$ 281.00
Our price:
$ 238.00
ready for shipping in 24
h

Astronomik
Filters Luminanz L-3 UV-IR blocking filter, 1.25"
$ 86.00
ready for shipping in 3-7
days

Chroma
Filters LRGB Set 36mm
$ 960.00
ready for shipping in 24
h

Astronomik
Filters DeepSky 2" RGB filter set
$ 650.00
ready for shipping in 3-7
days

Baader
Filters LRGB CMOS 1.25"
$ 325.00
ready for shipping in 1-2
weeks

Optolong
Filters LRGB Filter-Set 1,25
RRP:
$ 266.00
Our price:
$ 227.00
ready for shipping in 24
h

Astronomik
Filters L-2 UV-IR Block Clip Sony Alpha
$ 162.00
ready for shipping in 3-7
days

Astronomik
Filters Luminanz filter L-1 UV-IR blocking filter, 1.25"
$ 86.00
ready for shipping in 3-7
days

IDAS
Filters Type 4 BGR+L 31mm
$ 1,090.00
ready for shipping in 24
h

ZWO
Filters LRGB 2" Filter Set
RRP:
$ 520.00
Our price:
$ 461.00
ready for shipping in 3-5
weeks

IDAS
Filters Type 4 BGR+L 52mm
$ 1,090.00
ready for shipping in 24
h

Baader
Filters LRGB CMOS 50.4mm
$ 600.00
ready for shipping in 1-2
weeks

Astronomik
Filters Deep-Sky RGB 50x50mm
$ 760.00
ready for shipping in 3-7
days

Astronomik
Filters DeepSky RGB Set 50mm
$ 650.00
ready for shipping in 3-7
days

Baader
Filters LRGB CMOS 36mm
$ 418.00
ready for shipping in 1-2
weeks

Baader
Filters RGB CMOS 2"
$ 421.00
ready for shipping in 24
h

Astronomik
Filters Luminanz L-3 2" UV-IR blocking filter
$ 151.00
ready for shipping in 3-7
days

Baader
Filters RGB CMOS 36mm
$ 335.00
ready for shipping in 1-2
weeks

Astronomik
Filters L-3 UV-IR Block Clip Nikon XL
$ 173.00
ready for shipping in 3-7
days

Astronomik
Filters Luminanz L-2 T2 UV-IR blocking filter
$ 130.00
ready for shipping in 3-7
days

Astronomik
Filters Luminanz L-2 UV-IR blocking filter, 50mm
$ 130.00
ready for shipping in 3-7
days

Astronomik
Filters DeepSky RGB filter set, 36mm, unmounted
$ 433.00
ready for shipping in 3-7
days