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TELESCOPE FILTER INFORMATION

Telescope Filter Colour Chart & Comparison

Telescope filters most commonly consist of a circular glass threaded ring that attaches to the bottom of the eyepiece, the glass filter can be coated with a large variety of options from colour dyes in gelatine to exotic metal oxides. Each type of coating modifies the behaviour of the glass and offers a variety of optical improvements and enhancements.

The filter model numbers / codes are called the Wratten Number, which are named after the founder of the first photography company and British inventor Frederic Wratten. The numbers are just a reference number however the letter indicates an increase in filter strength.

Below we have listed a few of the most popular filters used for astronomy viewing and photography.
Not all the Wratten numbers are shown.

SELECT THE WRATTEN (W) NUMBER OF YOUR FILTER TO SEE WHAT IT'S SUITABLE FOR VIEWING

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MERCURYNO
VENUSNO
MARSYES
JUPITERYES
SATURNNO
URANUSYES
NEPTUNEYES
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO
MERCURYNO
VENUSNO
MARSYES
JUPITERYES
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYYES
VENUSNO
MARSYES
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYYES
VENUSNO
MARSYES
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO
MERCURYYES
VENUSYES
MARSYES
JUPITERNO
SATURNNO
URANUSNO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYYES
VENUSNO
MARSYES
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSNO
MARSNO
JUPITERYES
SATURNYES
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSYES
MARSNO
JUPITERYES
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO
MERCURYNO
VENUSYES
MARSNO
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSYES
MARSNO
JUPITERYES
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYYES
VENUSNO
MARSYES
JUPITERYES
SATURNYES
URANUSYES
NEPTUNEYES
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSNO
MARSYES
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO
MERCURYNO
VENUSNO
MARSYES
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSNO
MARSNO
JUPITERYES
SATURNYES
URANUSNO
NEPTUNENO
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

OTHER FILTERS

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MERCURYNO
VENUSNO
MARSNO
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONNO
NEBULASYES
GALAXIESYES
CLUSTERSYES

 

MERCURYNO
VENUSNO
MARSNO
JUPITERNO
SATURNNO
URANUSNO
NEPTUNENO
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSYES
MARSYES
JUPITERYES
SATURNNO
URANUSNO
NEPTUNENO
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSNO
MARSYES
JUPITERYES
SATURNNO
URANUSNO
NEPTUNENO
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO

 

MERCURYNO
VENUSNO
MARSYES
JUPITERYES
SATURNYES
URANUSNO
NEPTUNENO
MOONNO
NEBULASNO
GALAXIESYES
CLUSTERSYES

 

MERCURYNO
VENUSNO
MARSYES
JUPITERYES
SATURNYES
URANUSYES
NEPTUNENO
MOONYES
NEBULASNO
GALAXIESNO
CLUSTERSNO
MERCURY
VENUS
MARS
JUPITER
SATURN
URANUS
NEPTUNE
MOON
NEBULAS
GALAXIES
CLUSTERS
 
MERCURY NO
VENUS NO
MARS YES
JUPITER YES
SATURN YES
URANUS NO
NEPTUNE NO
MOON YES
NEBULAS NO
GALAXIES NO
CLUSTERS NO
 

OTHER FILTERS

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WRATTEN NUMBERCOLOUR
W21ORANGE
W23ALIGHT RED
W25RED
W29DEEP RED
W57GREEN

 

WRATTEN NUMBERCOLOUR
W35RED
W38ADARK BLUE
W46BLUE
W47BLUE
OTHERNEUTRAL DENSITY
WRATTEN NUMBERCOLOUR
W12YELLOW
W15DEEP YELLOW
W21ORANGE
W23ALIGHT RED
W25RED
W29DEEP RED
W57GREEN
W58GREEN
W64BLUE / GREEN
OTHERNEUTRAL DENSITY
OTHERHIGH CONTRAST (UHC) / CONTRAST BOOSTER
OTHERINFRA RED (IR) CUT
OTHERINFRA RED (IR) PASS
OTHERFRINGE KILLER

 

WRATTEN NUMBERCOLOUR
W12YELLOW
W15DEEP YELLOW
W32MAGENTA
W38ADARK BLUE
W47BLUE 
W57GREEN
W80ALIGHT BLUE
OTHERNEUTRAL DENSITY
OTHERHIGH CONTRAST (UHC) / CONTRAST BOOSTER
OTHERINFRA RED (IR) CUT
OTHERINFRA RED (IR) PASS
OTHERFRINGE KILLER

 

WRATTEN NUMBERCOLOUR
W32MAGENTA
W57GREEN
W80ALIGHT BLUE
OTHERINFRA RED (IR) CUT
OTHERINFRA RED (IR) PASS
OTHERFRINGE KILLER

 

WRATTEN NUMBERCOLOUR
W12YELLOW
W57GREEN
OTHERINFRA RED (IR) PASS
WRATTEN NUMBERCOLOUR
W12YELLOW
W57GREEN
WRATTEN NUMBERCOLOUR
W21ORANGE
W57GREEN
W80ALIGHT BLUE
OTHERMOON FILTER
OTHERNEUTRAL DENSITY
OTHERHIGH CONTRAST (UHC) / CONTRAST BOOSTER
OTHERINFRA RED (IR) PASS
OTHERFRINGE KILLER

 

 

WRATTEN NUMBERCOLOUR
OTHERLIGHT POLLUTION FILTER
  
WRATTEN NUMBERCOLOUR
OTHERLIGHT POLLUTION REDUCTION
OTHERINFRA RED (IR) CUT

 

WRATTEN NUMBERCOLOUR
OTHERLIGHT POLLUTION REDUCTION
OTHERINFRA RED (IR) CUT