Celestron Series #3 4 Piece Filter Set (1.25") Light Red #23A, Blue #38A, Green #58 & 96ND-50%

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.

#23A Light Red 25% T
All observing information for this filter is the same as that given for the #25 filter, with the exception of the following: Mars - Reduces light from blue and green areas which darkens the maria, oases and canal markings, while lightening the orange-hued desert regions. Sharpens the boundaries of yellow dust clouds. Comets - Improves definition of comet dust tails.

#38A Blue 17% T
Moon - Enhance lunar detail. Jupiter - Enhance the boundaries between the reddish belts and adjacent bright zones. Useful for viewing the Great Red Spot. Mars - Very useful during the violet clearing. Helpful in studying surface features and polar caps. Mercury - Improve observation of dusky surface markings at twilight, when the planet is near the horizon. Saturn - Enhance low-contrast features between the belts and zones. Venus - Useful for increased contrast of dark shadings in upper Venusian clouds. Comets - Bring out the best definition in comet gas tails.

#58 Green 24% T
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.

#96ND 50% T - Density 0.3
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.