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Optec Mounted 2 inch Diameter Round filters

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  1. 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

  2. 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

  3. Optec - Optec Deep Sky Filter, mounted in 48mm threaded cell.

    Optec - Optec Deep Sky Filter, mounted in 48mm threaded cell.

    Deep Sky - Blocks the UV, violet and sodium light completely. The filter passes the important nebulae emission features with +90% transmission ... Learn More
    Model#: 17266
    $75.00

  4. 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

  5. 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

  6. Optec - #58 Light Green, mounted in 48mm threaded cell.

    Optec - #58 Light Green, mounted in 48mm threaded cell.

    #58 Light Green - Like the #47B, this filter was used for early RGB imaging. The low transmission in the green and some IR leak makes it a poor choice now for color work ... Learn More
    Model#: 17438
    $45.00

  7. 17430

    Optec - Violet light rejection filter, mounted in 48mm threaded cell.

    Violet Light Rejection - Blocks the UV and violet light shorter than 420nm. Most refractor optics including apochromatic telescopes are not well corrected in the short wavelengths ... Learn More
    Model#: 17430
    $45.00

  8. Optec - #47B Blue, mounted in 48mm threaded cell.

    Optec - #47B Blue, mounted in 48mm threaded cell.

    #47B Blue - Before the availability of cheap and good dichroic filters, this filter was used for RGB imaging to pass the blue band. Low transmission in the blue and very transparent in the IR makes this filter useful only for special projects ... Learn More
    Model#: 17436
    $45.00

  9. 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

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