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FLI Research Grade Filters

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  1. FLI - Research Grade 50mm Diameter Hb 6nm

    FLI - Research Grade 50mm Diameter Hb 6nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-Hb
    $595.00

  2. FLI - 28mm U Research Grade Filter from UBVRI

    FLI - 28mm U Research Grade Filter from UBVRI

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-U
    $290.00

  3. FLI Research Grade 50mm Square Oxygen III - 5nm

    FLI - Research Grade 50mm Square Oxygen III - 3nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50S-OIII3
    $1,250.00

  4. FLI Research Grade 50mm Square UBVRI 5mm Thick

    FLI - Research Grade 50mm Square UBVRI 5mm Thick

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-UBVRI
    $1,495.00

  5. FLI 28mm LRGB Research Grade Filters

    FLI - 28mm LRGB Research Grade Filters

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-LRGB
    $595.00

  6. FLI - Research Grade 50mm Diameter OIII

    FLI - Research Grade 50mm Diameter OIII

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-OIII
    $495.00

  7. RG_50S_OIII

    FLI - Research Grade 50mm Square Oxygen III - 8nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-OIII
    $495.00

  8. FLI - Research Grade 50mm Diameter LRGB 4.5nm Ha

    FLI - Research Grade 50mm Diameter LRGB 4.5nm Ha

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-HA4
    $1,450.00

  9. FLI 28mm R Research Grade Filter from UBVRI

    FLI - 28mm R Research Grade Filter from UBVRI

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-R
    $345.00

  10. FLI Research Grade 50mm Square Sulfur II - 5nm

    FLI - Research Grade 50mm Square Sulfur II - 5nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available.

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    (48 States)
    Model#: RG-50S-SII5
    $875.00

  11. FLI - Research Grade 50mm Square LRGB 4.5nm Ha

    FLI - Research Grade 50mm Square LRGB 4.5nm Ha

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-LRGB-Ha-45
    $1,995.00

  12. FLI - Research Grade 50mm Diameter UBVRI Filters

    FLI - Research Grade 50mm Diameter UBVRI Filters

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-UBVRI
    $1,495.00

  13. FLI Research Grade 50mm Square Ha 8nm

    FLI - Research Grade 50mm Square Ha 8nm

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-Ha-8nm
    $495.00

  14. FLI - Research Grade 50mm Diameter Ha 4.5nm

    FLI - Research Grade 50mm Diameter Ha 4.5nm

    RG 50D Ha (4.5nm)FLI Research Grade filter sets are par focal to F4.5 (individual filters are also available, contact FLI)Size: 50 mm +0.2 / -0.5mmShape: roundThickness: 3mm +/-0 ... Learn More
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    (48 States)
    Model#: RG_50D_Ha_45
    $795.00

  15. FLI - Research Grade 50mm Diameter Luminance IR

    FLI - Research Grade 50mm Diameter Luminance IR

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-L
    $225.00

  16. FLI - 28mm B Research Grade Filter from UBVRI

    FLI - 28mm B Research Grade Filter from UBVRI

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-28D-B
    $290.00

  17. FLI - Research Grade 50mm Square Sulfur II - 3

    FLI - Research Grade 50mm Square Sulfur II - 3

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-SII3
    $1,250.00

  18. FLI Research Grade 50mm Square Luminance IR

    FLI - Research Grade 50mm Square Luminance IR

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-L
    $225.00

  19. FLI - 28mm UBVRI Research Grade Filters

    FLI - 28mm UBVRI Research Grade Filters

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    FREE SHIPPING
    (48 States)
    Model#: RG-28D-UBVRI
    $595.00

  20. FLI Research Grade 50mm Square LRGB

    FLI - Research Grade 50mm Square LRGB

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-LRGB
    $1,295.00

Items 1 to 20 of 35 total

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Our high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. We offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

Features:

AR: Durable AR coatings on both exterior surfaces over applicable transmission range

Scratch Dig: 60/40 or better (max scratch width 0.006mm, max dig 0.40mm)

Transmitted wavefront @ 633nm: Better than 0.25 wave/inch

Wedge: Better than 30 arcsec

Thickness: 5 +/- 0.05mm, par focal +/- 0.2mm, (filters start par focal +/- 0.1mm per recipe)