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  1. SBIG - 1.25" Filter Insert for FW5- & FW8-8300

    SBIG - 1.25" Filter Insert for FW5- & FW8-8300

    1.25" Filter Insert for FW5- & FW8-8300 ... Learn More
    Model#: SB10105
    $24.00

  2. QSI - Astronomik 1.25" Dark Filter

    QSI - Astronomik 1.25" Dark Filter

    Astronomik 1.25" dark "filter". This is a threaded 1.25" filter cell with an opaque solid disk to prevent light from striking the CCD. It can be used for taking bias and dark frames without the use of a mechanical shutter ... Learn More
    Model#: FL1-AS-DARK
    $29.00

  3. Celestron - Skryis IR-Block Filter

    Celestron - Skryis IR-Block Filter

    Color CCD cameras such as the Skyris color planetary cameras are very sensitive across the visual spectrum, as well as in infrared.

    ...
    Learn More
    Model#: 95516
    $29.95

  4. Optec - Clear window, 2.0±0.4mm thick.
  5. Optec - #47B Blue, 50mm diam x 2mm thick

    Optec - #47B Blue, 50mm diam x 2mm thick

    This filter is used for RGB imaging to pass the blue band ... Learn More
    Model#: 17236
    $30.00

  6. Optec - #21 Orange, 50mm diam x 2mm thick

    Optec - #21 Orange, 50mm diam x 2mm thick

    Optec - #21 Orange, 50mm diam x 2mm thick ;Blocks blue completely and ... Learn More
    Model#: 17233
    $30.00

  7. Optec - #80A Medium Blue, 50mm diam x 2mm thick

    Optec - #80A Medium Blue, 50mm diam x 2mm thick

    Low transmission in the blue and very transparent in ... Learn More
    Model#: 17239
    $30.00

  8. Optec - #8 Pale Yellow, 50mm diam. x 2mm thick.

    Optec - #8 Pale Yellow, 50mm diam. x 2mm thick.

    Does a better job blocking the violet and UV at the expense of ... Learn More
    Model#: 17231
    $30.00

  9. Optec - #29 Deep Red, 50mm diam x 2mm thick

    Optec - #29 Deep Red, 50mm diam x 2mm thick

    Passes light longer that 610 nm. This filter is ... Learn More
    Model#: o17237
    $30.00

  10. 17229

    Optec - Violet rejection filter, 50mm diam x 2mm thick.

    Most refractor optics including apochromatic telescopes are not ... Learn More
    Model#: 17229
    $30.00

  11. Optec - #23A Light Red,  50mm diam x 2mm thick

    Optec - #23A Light Red, 50mm diam x 2mm thick

    Blocks blue and green light completely, passes light longer than ... Learn More
    Model#: o17235
    $30.00

  12. Optec - ND 0.6 (25% T), Neutral Density 25% transmission, 2.0±0.4mm thick.
  13. Optec - #12 Yellow, 50mm diam x 2mm thick

    Optec - #12 Yellow, 50mm diam x 2mm thick

    Optec - #12 Yellow Wratten filter 50mm x2mm ... Learn More
    Model#: 17232
    $30.00

  14. Optec - #58 Light Green, 50mm diam x 2mm thick

    Optec - #58 Light Green, 50mm diam x 2mm thick

    an inexpensive way to get the sharpest image from most telescope systems. ... Learn More
    Model#: 17238
    $30.00

  15. Astronomik - MC Clear Multicoated Filter - 1.25" Round Mounted

    Astronomik - MC Clear Multicoated Filter - 1.25" Round Mounted

    This Multicoated (MC) glass serves as dust protector or to keep your system parfocal with other Astronomik filters.

    ...
    Learn More
    Model#: C-1
    $44.95

  16. Optec - #21 Orange, mounted in 48mm threaded cell.

    Optec - #21 Orange, mounted in 48mm threaded cell.

    #21 Orange - Blocks blue completely and some green light. Passes light longer than 560 nm ... Learn More
    Model#: 17433
    $45.00

  17. Optec - #8 Pale Yellow, mounted in 48mm threaded cell.

    Optec - #8 Pale Yellow, mounted in 48mm threaded cell.

    #8 Pale Yellow - Does a better job blocking the violet and UV at the expense of some blue. Recommended for monchromatic use when the most energy flux is to be passed ... Learn More
    Model#: 17431
    $45.00

  18. Optec - #29 Deep Red, mounted in 48mm threaded cell.

    Optec - #29 Deep Red, mounted in 48mm threaded cell.

    #29 Deep Red - Passes light longer that 610 nm. This filter is a little more effective than the #23A in dakening the sky ... Learn More
    Model#: 17437
    $45.00

  19. Optec - #23A Light Red, mounted in 48mm threaded cell.

    Optec - #23A Light Red, mounted in 48mm threaded cell.

    #23A Light Red - Blocks blue and green light completely. Passes light longer than 600nm ... Learn More
    Model#: 17435
    $45.00

  20. Optec - Premium UV blocking filter with 435nm cutoff, mounted in 48mm threaded cell.

    Optec - Premium UV blocking filter with 435nm cutoff, mounted in 48mm threaded cell.

    Premium UV/Violet Block - Optec acquired a limited number of Schott glass filters made from GG-435 glass. Similar to #17431 but of higher optical quality ... Learn More
    Model#: 17432
    $45.00

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