TPO #15A Dark Yellow Color Filter & Case - 1.25"

TPO #15A Dark Yellow Color Filter & Case - 1.25"
Item # OS-F15
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  • The TPO #15A Dark Yellow Color Filter is considered a good general purpose filter for telescopes with apertures of less than 4.5".
  • This #15A Dark Yellow Filter increases the contrast of lunar features, helps Martian polar ice caps and clouds come into view, and helps with the equatorial belts on Jupiter and Saturn.
  • The TPO #15A Dark Yellow Color Filter comes with a hinged, plastic case for storage and protection.
  • Fits 1.25" eyepieces and other accessories with threaded 1.25" barrels.
  • For terms and conditions please examine the TPO Warranty page here.



TPO #15A Dark Yellow Color Filter for 1.25" Eyepieces

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue.

TPO filters are made of high quality, solid plane parallel glass with excellent homogeneity. They are anti-reflection coated to prevent glaring and ghosting. This eyepiece filter is threaded to fit most 1.25" eyepieces, and comes with a hinged, plastic case to keep your filter safe and clean when not in use.

The #15A Dark Yellow Filter has a transmission of 67%, and is a good general-purpose filter for telescopes with less than 4.5" of aperture (114mm). The #15 filter will improve the contrast of features on the Moon It will also help you see the equatorial belts on Jupiter and Saturn, clouds and the polar ice caps on Mars, and the dusky detail on Uranus and Neptune.

TPO Product Number: OS-F15

Additional Information

Additional Information

Manufacturer TPO
Type of Filter Color
Filter Usage Imaging, Visual
Single or Set? Single Filter
Filter Size 1.25"
Filter Shape Round
Filter Mounted? Mounted
Warranty 2 Year Warranty
Wratten # 15A
Included Items

Included Items

  • TPO #15A Dark Yellow Filter in 1.25" metal cell
  • Plastic case
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