USED - Baader 1.25" Red Filter

Baader Planetarium

USED - Baader 1.25" Red Filter

Regular price
$ 51.00
Sale price
$ 35.00
Unit price
Only 1 Left!

In Stock


This filter is in great condition!


  • Red 610nm longpass filter with steep absorption edge.
  • Filters the H-alpha line from the visible spectrum.
  • Blue and Green lights is almost completely filtered blocked increasing contrast between the light and dark bands on Jupiter and Saturn.
  • Most interesting filter to use for observing the polar caps of Mars.
  • An optimum filter for daily observation of all the planets.
  • Multi-coated for max contrast – no reflections, scatter or dimming.
  • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
  • Both sides 7-layer AR coating with only 0.25% residual reflection per surface. This is the most antireflective that has ever been undertaken with color filters.

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