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{"id":4036808507437,"title":"Alpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter for Telescopes","handle":"alpine-astronomical-80mm-astf-baader-astrosolar-5-0-white-light-solar-filter-for-telescopes","description":"\u003cstyle\u003e body { color: black !important; } html { color: black; } h3 { color: black; } p { color: #000000; margin: 0; padding: 0; } .a { list-style-type: circle; margin-left: 10px; padding-left: 10px; } h2 { color: #000000; margin: 0; padding: 0; } div { margin: 0; padding: 0; } #content { margin: 0; padding: 0; }\u003c\/style\u003e\u003clink rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css?family=Open+Sans:300,600\"\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=UTF-8\"\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=UTF-8\"\u003e\u003ch3\u003eAlpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter for Telescopes\u003c\/h3\u003e\u003cp id=\"b\"\u003eUnlike many white-light solar filters that produce views of the sun with a red-orange, bluish, or yellow tint, the \u003cb\u003eAlpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter\u003c\/b\u003e reveals the sun in its natural white color. With an optical density of 5.0 for safe solar viewing though an optic like a telescope or spotting scope, the filter shows more surface details with greater clarity versus other types of solar filters. The filter is mounted onto a clear-white IR-rejecting plastic ring, which acts as a stabilizing element for the filter cell, and the ring is in turn mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar to minimize thermal stress on the film for increased resistance to developing pinholes or tears.\u003c\/p\u003e\u003cp\u003eWith the ability to be installed on the outside or inside of an optical tube assembly, dew shield, or corrector plate retaining ring, this filter provides a safe way to view the sun through conventional nighttime telescopes. Recommended for apertures from 70-90mm, the filter is engineered with three centering bolts that can fit OTAs, dew shields or corrector plates with an outside diameter of 100-140mm, or an inside diameter of 130-170mm. Due to the shallow depth of the corrector plate on most catadioptric OTAs, for secure and safe use, Alpine Astronomical only recommends outside mounting on Cassegrain-style telescopes.\u003c\/p\u003e\u003ch3\u003eProduct Features\u003c\/h3\u003e\u003cul class=\"a\"\u003e \u003cli\u003eSafe Solar Viewing with Nighttime OTAs\u003c\/li\u003e \u003cli\u003eFor Detailed, High-Magnification Viewing\u003c\/li\u003e \u003cli\u003eBroad-Band Neutral-White Color\u003c\/li\u003e \u003cli\u003eOptical Density of 5.0\u003c\/li\u003e \u003cli\u003e70-90mm Recommended Aperture\u003c\/li\u003e \u003cli\u003eFront Clear White IR-Rejecting Ring\u003c\/li\u003e \u003cli\u003eThree Centering Bolts and Safety Straps\u003c\/li\u003e \u003cli\u003eNo Tools or Modifications Required\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2019-10-06T01:46:19+10:00","created_at":"2019-09-03T00:46:39+10:00","vendor":"Alpine 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#000000; margin: 0; padding: 0; } .a { list-style-type: circle; margin-left: 10px; padding-left: 10px; } h2 { color: #000000; margin: 0; padding: 0; } div { margin: 0; padding: 0; } #content { margin: 0; padding: 0; }\u003c\/style\u003e\u003clink rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css?family=Open+Sans:300,600\"\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=UTF-8\"\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=UTF-8\"\u003e\u003ch3\u003eAlpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter for Telescopes\u003c\/h3\u003e\u003cp id=\"b\"\u003eUnlike many white-light solar filters that produce views of the sun with a red-orange, bluish, or yellow tint, the \u003cb\u003eAlpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter\u003c\/b\u003e reveals the sun in its natural white color. With an optical density of 5.0 for safe solar viewing though an optic like a telescope or spotting scope, the filter shows more surface details with greater clarity versus other types of solar filters. The filter is mounted onto a clear-white IR-rejecting plastic ring, which acts as a stabilizing element for the filter cell, and the ring is in turn mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar to minimize thermal stress on the film for increased resistance to developing pinholes or tears.\u003c\/p\u003e\u003cp\u003eWith the ability to be installed on the outside or inside of an optical tube assembly, dew shield, or corrector plate retaining ring, this filter provides a safe way to view the sun through conventional nighttime telescopes. Recommended for apertures from 70-90mm, the filter is engineered with three centering bolts that can fit OTAs, dew shields or corrector plates with an outside diameter of 100-140mm, or an inside diameter of 130-170mm. Due to the shallow depth of the corrector plate on most catadioptric OTAs, for secure and safe use, Alpine Astronomical only recommends outside mounting on Cassegrain-style telescopes.\u003c\/p\u003e\u003ch3\u003eProduct Features\u003c\/h3\u003e\u003cul class=\"a\"\u003e \u003cli\u003eSafe Solar Viewing with Nighttime OTAs\u003c\/li\u003e \u003cli\u003eFor Detailed, High-Magnification Viewing\u003c\/li\u003e \u003cli\u003eBroad-Band Neutral-White Color\u003c\/li\u003e \u003cli\u003eOptical Density of 5.0\u003c\/li\u003e \u003cli\u003e70-90mm Recommended Aperture\u003c\/li\u003e \u003cli\u003eFront Clear White IR-Rejecting Ring\u003c\/li\u003e \u003cli\u003eThree Centering Bolts and Safety Straps\u003c\/li\u003e \u003cli\u003eNo Tools or Modifications Required\u003c\/li\u003e\n\u003c\/ul\u003e"}

Alpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter for Telescopes

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Alpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter for Telescopes

Unlike many white-light solar filters that produce views of the sun with a red-orange, bluish, or yellow tint, the Alpine Astronomical 80mm ASTF Baader AstroSolar 5.0 White-Light Solar Filter reveals the sun in its natural white color. With an optical density of 5.0 for safe solar viewing though an optic like a telescope or spotting scope, the filter shows more surface details with greater clarity versus other types of solar filters. The filter is mounted onto a clear-white IR-rejecting plastic ring, which acts as a stabilizing element for the filter cell, and the ring is in turn mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar to minimize thermal stress on the film for increased resistance to developing pinholes or tears.

With the ability to be installed on the outside or inside of an optical tube assembly, dew shield, or corrector plate retaining ring, this filter provides a safe way to view the sun through conventional nighttime telescopes. Recommended for apertures from 70-90mm, the filter is engineered with three centering bolts that can fit OTAs, dew shields or corrector plates with an outside diameter of 100-140mm, or an inside diameter of 130-170mm. Due to the shallow depth of the corrector plate on most catadioptric OTAs, for secure and safe use, Alpine Astronomical only recommends outside mounting on Cassegrain-style telescopes.

Product Features

  • Safe Solar Viewing with Nighttime OTAs
  • For Detailed, High-Magnification Viewing
  • Broad-Band Neutral-White Color
  • Optical Density of 5.0
  • 70-90mm Recommended Aperture
  • Front Clear White IR-Rejecting Ring
  • Three Centering Bolts and Safety Straps
  • No Tools or Modifications Required

Buy with confidence as this product comes with 18 months full local warranty in Australia & New Zealand (unless otherwise stated in the overview).

This product also comes with the benefits of the CocoonPower Warranty. For further details please read our Warranty Guidelines.

You can also purchase 3 Year Extended Care. If you are interested please see our Extended Care Information.

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