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Filters

Choose from our selection of Moon Filters, Nebular Filters, Solar Filters, Solar Glasses, Protective Filters & more from reputable brands such as Explore Scientific, Kowa, Lunt Solar Systems, DayStar, Astrozap, Unistellar, Dwarf Lab, and Vaonis.

  • DayStar 80mm Off-Axis ERF with 311mm Inside Diameter Cap
    Special Order
    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00

    DayStar 80mm Off-Axis ERF with 311mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 80mm Off-Axis Energy Rejection Filter with 311mm Inside Diameter Cap - for 10-inch SCT - E-281F80 The DayStar 80mm Off-Axis Energy Rejectio...

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    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00
    Special Order
  • DayStar 80mm Off-Axis ERF with 281mm Inside Diameter Cap
    Special Order
    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00

    DayStar 80mm Off-Axis ERF with 281mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 80mm Off-Axis Energy Rejection Filter with 281mm Inside Diameter Cap - for 9.25-inch SCT - E-281F80 The DayStar 80mm Off-Axis ERF with 281 ...

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    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00
    Special Order
  • DayStar 63mm Off-Axis ERF with 244mm Inside Diameter Cap
    Special Order
    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00

    DayStar 63mm Off-Axis ERF with 244mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 63mm Off-Axis Energy Rejection Filter with 244mm Inside Diameter Cap - for 8-inch SCT - E-244F63 Introducing the DayStar 63mm Off-Axis Ener...

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    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00
    Special Order
  • DayStar 150mm ERF with 220mm Inside Diameter Cap
    Special Order
    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00

    DayStar 150mm ERF with 220mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 150mm Energy Rejection Filter with 220mm Inside Diameter Cap - For Refractor - E-220N150 The DayStar 150mm Energy Rejection Filter with a 2...

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    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00
    Special Order
  • DayStar 150mm ERF with 210mm Inside Diameter Cap
    Special Order
    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00

    DayStar 150mm ERF with 210mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 150mm Energy Rejection Filter with 210mm Inside Diameter Cap - For Refractor - E-210N150 Meet the DayStar 150mm Energy Rejection Filter wit...

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    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00
    Special Order
  • DayStar 150mm ERF with 200mm Inside Diameter Cap
    Special Order
    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00

    DayStar 150mm ERF with 200mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 150mm Energy Rejection Filter with 200mm Inside Diameter Cap - For Refractor - E-200N150 Presenting the DayStar 150mm Energy Rejection Filt...

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    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00
    Special Order
  • DayStar 150mm ERF with 190mm Inside Diameter Cap
    Special Order
    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00

    DayStar 150mm ERF with 190mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 150mm Energy Rejection Filter with 190mm Inside Diameter Cap - For Refractor - E-190N150 Discover the DayStar 150mm Energy Rejection Filter...

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    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00
    Special Order
  • DayStar 130mm ERF with 190mm Inside Diameter Cap
    Special Order
    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00

    DayStar 130mm ERF with 190mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 130mm Energy Rejection Filter with 190mm Inside Diameter Cap - For Refractor - E-190N130 Presenting the DayStar 130mm Energy Rejection Filt...

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    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00
    Special Order
  • DayStar 150mm ERF with 180mm Inside Diameter Cap
    Special Order
    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00

    DayStar 150mm ERF with 180mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 150mm Energy Rejection Filter with 180mm Inside Diameter Cap - For Refractor - E-180N150 Introducing the DayStar 150mm Solar Energy Rejecti...

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    $2,221.00 - $2,221.00
    $2,221.00
    $2,221.00 - $2,221.00
    $2,221.00
    Special Order
  • DayStar 130mm ERF with 180mm Inside Diameter Cap
    Special Order
    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00

    DayStar 130mm ERF with 180mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 130mm Energy Rejection Filter with 180mm Inside Diameter Cap - For Refractor - E-180N130 The DayStar 130mm Energy Rejection Filter featurin...

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    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00
    Special Order
  • DayStar 130mm ERF with 170mm Inside Diameter Cap
    Special Order
    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00

    DayStar 130mm ERF with 170mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 130mm Energy Rejection Filter with 170mm Inside Diameter Cap - For Refractor - E-170N130 Discover the DayStar 130mm Energy Rejection Filter...

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    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00
    Special Order
  • DayStar 130mm ERF with 160mm Inside Diameter Cap
    Special Order
    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00

    DayStar 130mm ERF with 160mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 130mm Energy Rejection Filter with 160mm Inside Diameter Cap - For Refractor - E-160N130 The DayStar 130mm Energy Rejection Filter featurin...

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    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00
    Special Order
  • DayStar 130mm ERF with 150mm Inside Diameter Cap
    Special Order
    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00

    DayStar 130mm ERF with 150mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 130mm Energy Rejection Filter with 150mm Inside Diameter Cap - For Refractor - E-150N130 Presenting the DayStar 130mm Energy Rejection Filt...

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    $1,344.00 - $1,344.00
    $1,344.00
    $1,344.00 - $1,344.00
    $1,344.00
    Special Order
  • DayStar 100mm ERF with 150mm Inside Diameter Cap
    Special Order
    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00

    DayStar 100mm ERF with 150mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 100mm Energy Rejection Filter with 150mm Inside Diameter Cap - For Refractor - E-150N100 Introducing the DayStar 100mm Energy Rejection Fil...

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    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00
    Special Order
  • DayStar 100mm ERF with 140mm Inside Diameter Cap
    Special Order
    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00

    DayStar 100mm ERF with 140mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 100mm Energy Rejection Filter with 140mm Inside Diameter Cap - For Refractor - E-140N100 The DayStar 100mm Energy Rejection Filter featurin...

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    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00
    Special Order
  • DayStar 100mm ERF with 130mm Inside Diameter Cap
    Special Order
    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00

    DayStar 100mm ERF with 130mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 100mm Energy Rejection Filter with 130mm Inside Diameter Cap - For Refractor - E-130N100 Meticulously crafted DayStar 100mm Energy Rejectio...

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    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00
    Special Order
  • DayStar 100mm ERF with 120mm Inside Diameter Cap
    Special Order
    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00

    DayStar 100mm ERF with 120mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 100mm Energy Rejection Filter with 120mm Inside Diameter Cap - for Refractors - E-120N100 Presenting the DayStar 100mm Energy Rejection Fil...

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    $939.00 - $939.00
    $939.00
    $939.00 - $939.00
    $939.00
    Special Order
  • DayStar 80mm ERF with 120mm Inside Diameter Cap
    Special Order
    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00

    DayStar 80mm ERF with 120mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 80mm Energy Rejection Filter with 120mm Inside Diameter Cap - For Refractor - E-120N80 The DayStar 80mm Energy Rejection Filter featuring a...

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    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00
    Special Order
  • DayStar 80mm ERF with 110mm Inside Diameter Cap Set
    DayStar Energy Rejection-Refractor 80mm and 110mm ID Cap - For Refractor
    Special Order
    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00

    DayStar 80mm ERF with 110mm Inside Diameter Cap

    DayStar
    Coming soon

    DayStar 80mm Energy Rejection Filter with 110mm Inside Diameter Cap - For Refractor - E-110N80 Introducing the DayStar Energy Rejection-Refractor 8...

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    $743.00 - $743.00
    $743.00
    $743.00 - $743.00
    $743.00
    Special Order
  • DayStar Quantum H-Alpha 0.8Å PE Solar Filter 0.8 Angstrom
    DayStar Quantum Hydrogen Alpha 0.8A PE Solar Filter - .8QPE
    $16,187.00 - $16,187.00
    $16,187.00
    $16,187.00 - $16,187.00
    $16,187.00

    DayStar Quantum H-Alpha 0.8Å PE Solar Filter

    DayStar
    In stock

    DayStar Quantum Hydrogen Alpha 0.8Å PE Solar Filter - .8QPE The cutting-edge DayStar Quantum Hydrogen Alpha 0.8Å PE Solar Filter, meticulously desi...

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    $16,187.00 - $16,187.00
    $16,187.00
    $16,187.00 - $16,187.00
    $16,187.00
  • DayStar Quantum H-Alpha 0.3-0.5A SE Solar Filter
    $12,144.00 - $12,144.00
    $12,144.00
    $12,144.00 - $12,144.00
    $12,144.00

    DayStar Quantum H-Alpha 0.3-0.5Å SE Solar Filter

    DayStar
    In stock

    DayStar Quantum Hydrogen Alpha 0.3-0.5Å SE Solar Filter - QSE-C Discover the DayStar Quantum H-Alpha 0.3-0.5Å SE Solar Filter, specializes in captu...

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    $12,144.00 - $12,144.00
    $12,144.00
    $12,144.00 - $12,144.00
    $12,144.00
  • DayStar Quantum 0.4Å PE Solar Filter - Sodium D-Line
    $24,287.00 - $24,287.00
    $24,287.00
    $24,287.00 - $24,287.00
    $24,287.00

    DayStar Quantum 0.4Å PE Solar Filter - Sodium D-Line

    DayStar
    In stock

    DayStar Quantum 0.4Å PE Solar Filter - Sodium D-Line - NAD.4UNI The DayStar Quantum 0.4Å PE Solar Filter in Sodium D-Line variant is designed for ...

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    $24,287.00 - $24,287.00
    $24,287.00
    $24,287.00 - $24,287.00
    $24,287.00
  • DayStar Quantum 2Å PE Solar Filter Calcium II K-Line Close Up Image of the Sun
    DayStar Quantum 2A PE Solar Filter - Calcium II K-Line
    $24,287.00 - $24,287.00
    $24,287.00
    $24,287.00 - $24,287.00
    $24,287.00

    DayStar Quantum 2Å PE Solar Filter - Calcium II K-Line

    DayStar
    In stock

    DayStar Quantum 2Å PE Solar Filter - Calcium II K-Line - CK2AUNI The DayStar Quantum 2Å PE Solar Filter, meticulously crafted to precisely capture ...

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    $24,287.00 - $24,287.00
    $24,287.00
    $24,287.00 - $24,287.00
    $24,287.00
  • Image_No.2_Taken_Using_DayStar_Quantum_5_PE_Solar_Filter_Calcium_II_H-Line
    DayStar Quantum 5A PE Solar Filter - Calcium II H-Line
    $18,887.00 - $18,887.00
    $18,887.00
    $18,887.00 - $18,887.00
    $18,887.00

    DayStar Quantum 5Å PE Solar Filter - Calcium II H-Line

    DayStar
    In stock

    DayStar Quantum 5Å PE Solar Filter - Calcium II H-Line - CH5AUNI Introducing the DayStar Quantum 5Å PE Solar Filter, precisely tuned for capturing ...

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    $18,887.00 - $18,887.00
    $18,887.00
    $18,887.00 - $18,887.00
    $18,887.00