Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 19 cm (7.48")

Special Order

Expected availability: 7-14 business days

You Pay: $875.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 17 cm (6.692")

Special Order

Expected availability: 7-14 business days

You Pay: $1,055.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 21 cm (8.267")

Special Order

Expected availability: 7-14 business days

You Pay: $1,175.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 20 cm (7.874")

Special Order

Expected availability: 7-14 business days

You Pay: $1,175.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 19 cm (7.48")

Special Order

Expected availability: 7-14 business days

You Pay: $1,175.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 18 cm (7.086")

Special Order

Expected availability: 3-5 weeks

You Pay: $1,175.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 20 cm (7.874")

Special Order

Expected availability: 7-14 business days

You Pay: $1,035.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 22 cm (8.661")

Special Order

Expected availability: 7-14 business days

You Pay: $1,175.00

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  • Enables the Use of 2" Visual Accessories
  • Protective Brass Compression Ring
  • ATM and University Filter Compatible

Special Order

Expected availability: 7-14 business days

You Pay: $52.00

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  • Adapts Quantum Filters to 2" Tubes
  • Requires Q3GF1F Front Plate

In Stock

Order by 4pm to ship today

You Pay: $52.00

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More on the Way

Expected availability: 7-10 business days

You Pay: $65.00

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Top Highlights

  • Highly-Precise Research-Grade Filter
  • Anti-Reflection Coated BK7 Glass
  • High-Sensitivity Tuning for Photography
  • RS-232 Serial Port for Computer Control
  • Recommended for use at f/15-f/20
  • Runs on 12 VDC Power

Special Order

Expected availability: 7-14 business days

You Pay: $6,670.00

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More on the Way

Expected availability: 7-10 business days

You Pay: $99.00

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Top Highlights

  • 80mm Achromatic Doublet Refractor
  • 480mm Focal Length, f/6 Focal Ratio
  • Conventional Astronomical Telescope
  • Fully Multi-Coated Optics
  • Precision 2" Hybrid Focuser
  • Vixen-Style Dovetail Plate
  • Hard Aluminum Carrying Case
  • Retractable Sunshade/Dew Shield
  • OTA Only - Mount and Tripod Required

Special Order

Expected availability: 7-14 business days

You Pay: $695.00

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Top Highlights

  • 80mm Achromatic Doublet Refractor
  • Conventional Nighttime Telescope
  • 480mm Focal Length, f/6 Focal Ratio
  • 2" Hybrid Focuser, Dielectric Diagonal
  • Sodium-D Solar and 12mm Blocking Filters
  • View Active Regions, Plage, Granulation
  • ±0.5Å Wing Shift Tuning
  • 2-Element Telecentric 4.2x Barlow Lens
  • Vixen-Style Dovetail Plate
  • OTA Only - Mount and Tripod Required

Special Order

Expected availability: 7-14 business days

You Pay: $1,750.00

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Top Highlights

  • For Solar Observation or Photography
  • Anti-Reflection Coated BK7 Glass
  • Highly-Precise Electronic Tuning
  • RS-232 Serial Port for Computer Control
  • Recommended for use at f/15-f/20
  • Runs on 12 VDC Power

Special Order

Expected availability: 7-14 business days

You Pay: $4,600.00

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Top Highlights

  • For Use on Schmidt-Cassegrain OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Cap Inside Diameter: 24.4cm (9.606")

Special Order

Expected availability: 7-14 business days

You Pay: $402.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 11 cm (4.33")

Special Order

Expected availability: 7-14 business days

You Pay: $402.00

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Top Highlights

  • For Use on Refractor and Maksutov OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Inside Diameter of Cap: 12 cm (4.724")

Special Order

Expected availability: 7-14 business days

You Pay: $460.00

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Top Highlights

  • For Use on Schmidt-Cassegrain OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Cap Inside Diameter: 28.1cm (11.063")

Special Order

Expected availability: 7-14 business days

You Pay: $460.00

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Top Highlights

  • For Use on Schmidt-Cassegrain OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Cap Inside Diameter: 31.1cm (12.244")

Special Order

Expected availability: 7-14 business days

You Pay: $460.00

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Top Highlights

  • For Use on Schmidt-Cassegrain OTAs
  • Reduces Heat Load on Filter Assembly
  • Absorbs or Reflects UV and/or IR Light
  • For H-alpha, Sodium, Helium D3 Filters
  • Cap Inside Diameter: 31.1cm (12.244")

Special Order

Expected availability: 7-14 business days

You Pay: $518.00

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  • Enables Astrophotography/Imaging
  • Adapt Cameras to Quark Filters
  • Requires Camera-Specific T-Ring

Special Order

Expected availability: 7-14 business days

You Pay: $69.00

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  • Enables Astroimaging
  • Adapt Imaging Systems to Quark Filters

Special Order

Expected availability: 7-14 business days

You Pay: $45.00

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