TPO #12 Yellow Color Filter & Case - 1.25" Round Mounted

TPO #12 Yellow Color Filter & Case - 1.25" Round Mounted
Item # OS-F12
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  • Threads into barrels of 1.25" eyepieces.
  • The TPO #12 Yellow Eyepiece Filter (74% transmission) enhances red/orange features on Saturn & Jupiter.
  • Increases contrast of blue/green features on Mars.
  • The TPO #12 Yellow Color Filter comes with a hinged, plastic storage case.
  • For terms and conditions please examine the TPO Warranty page here.



TPO #12 Yellow Color Filter

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. All eyepiece filters are threaded to fit most 1.25" eyepieces and offer a full 26mm clear aperture. Comes with a hinged, plastic case to keep your filter safe and clean when not in use.

The #12 Yellow Color Filter contrasts strongly with blue-colored features on Jupiter and Saturn, while enhancing red and orange features. Lightens red-orange features on Mars, while reducing or blocking the transmission, and thereby increasing the contrast, of blue-green areas. Useful in increasing the contrast of lunar features in telescopes 6" aperture and larger.

TPO Product Number: OS-F12

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
Integral Transmission SEE CODE 39 *** SEE CODE 39
Peak Transmission SEE CODE 38 *** SEE CODE 38
Included Items

Included Items

  • TPO #12 Yellow Color Filter
  • Case
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