SBIG 1.25" UV+IR Blocking Filter


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SBIG 1.25 $49.00

About SBIG 1.25"" Baader UV+IR

The Baader UV / IR blocking filter is essentially a luminance filter. It is included with ST-2000XCM color cameras to improve the color balance of the single shot color CCD by blocking the near IR light.

It can be placed behind a camera lens adapter. It is used to block the "out of focus" near IR light that causes stars to look bloated with using a typical 35mm camera lens to shoot wide field images.

SBIG 1.25"" Baader UV+IR Features

  • UV and IR (infrared blocking filter).
  • Optically polished to 1/4 wave and anti-reflection coated.
  • 98% Transmission average across the visible spectrum.
  • Reflects destructive heat radiation!
  • Protects your valuable solar observing equipment such as DAYSTAR filters and the like from excessive heat stress.
  • Stays cool and will not shatter if subjected to great thermal stress, since even intensive radiation is not absorbed - as with ordinary heat protective filters, such as KG-3 or KG-5. Energy is reflected due to an elaborate interference system of 39 dialectric coating layers.
  • Enables pinpoint star images with digital and CCD equipment.
  • Ultrahard and durable Ion-Beam IR Cut coatings, may be cleaned anytime without fear.
  • Hard and absolutely scratch resistant 7-layer multicoat featuring 0.3% residual reflection versus the 4.6% of an uncoated substrate.
  • Freedom from ghost images due to highest quality coatings. Planeoptically polished. Retains full image resolution even at highest magnification during solar observation or eyepiece projection.
  • Larger clear aperture than any competing 1.25" filter.
  • Better, more elaborate filter cell design than any competing filter, featuring a CNC-milled "crown" for ease of handling and attachment.
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