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GREEN
#56 Light Green 53% T [Series 2]
Moon– Enhances lunar features. Jupiter – Increases visibility of the Great Red Spot. Useful for
observing the low-contrast hues of blue and red that exist in the Jovian atmosphere. Mars – Excellent
for increased contrast of Martian polar caps, low clouds and yellowish dust storms. Venus – Useful for
Venusian cloud pattern studies. Reduces brightness of blue sky during daylight observing.
#58 Green 24% T [#94118-11 & Series 3]
All observing information for this filter is the same as that given for the #56 Green filter, with the
exception of the following:
Saturn – Enhances white features in the Saturnian atmosphere.
Comets – Useful for observing brighter comets.
VIOLET
#47 Violet 3% T [Series 4]
Mars – Useful for detecting high clouds and haze over the
Martian polar caps. Very useful during the violet clearing.
Mercury – Helpful in detecting faint features. Saturn – Good for
ring structure studies. Venus – Increases contrast of dark shading
in upper Venusian clouds. Comets – Useful for observing
brighter comets.
96ND FILTERS
#96ND 50% T – Density 0.3 [Series 3]
#96ND 25% T – Density 0.6 [#94118-15 & Series 2]
#96ND 13% T – Density 0.9 [#94118-16 & Series 1]
Moon – Excellent for reducing irradiation, glare and subject brightness. Colors are unaltered, as light
is transmitted uniformly over the entire spectrum. Each model performs somewhat differently,
depending on the brightness of the moon. Planets – Stacking in combination with color filters lowers
transmission, but retains true color balance for specific applications. Reduces glare on brighter planets
and minimizes irradiation. Binary Stars – Helpful in splitting binary stars, because it reduces glare and
diffraction effects around the brighter star of the binary pair.
POLARIZING
[#94118-17 & Series 1]
Reduces reflected polarized light in the earth’s atmosphere.
Moon & Planets – Invaluable in reducing irradiation and glare. Binary Stars – Helpful in splitting
binary stars, because it reduces glare and diffraction effects around the brighter star of the binary pair.
FILTER SETS
Celestron offers four convenient filter sets, which contain four different filters per set. Not only are
these highly useful filter combinations, but they also offer an economical way to add versatility to
your filter collection. Descriptions of all filters within these sets are given above.
[Series 1 – #94118-S1]
Orange, Light Blue, ND13%T, Polarizing (#s 21, 80A, 96ND-13, Polarizing)
[Series 2 – #94118-S2]
Deep Yellow, Red, Light Green, ND25% T (#s 12, 25, 56, 96ND-25)
[Series 3 – #94118-S3]
Light Red, Blue, Green, ND50% T (#s 23A, 38A, 58, 96ND-50)
[Series 4 – #94118-S4]
Yellow, Deep Yellow, Violet, Pale Blue (#s 8, 15, 47, 82A)