Custom Scientific

18 Item(s)
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  1. Custom Scientific - 2" Round UBVRI Filter Set

    $1,575.00
    SKU: 50-5500PHC

    This item is special order. Delivery times will vary. Place your order today and your card will not be charged until the item ships.

    2″ Custom Scientific UBVRI Filter Set, AR coated (5 filter set in 48mm threaded cells with 2″ OD)

    FREE SHIPPING(48 States)
  2. Custom Scientific - "B" Standard Grade Blue Filter - 50mm Round Unmounted

    $295.00
    SKU: CU-50B

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

    FREE SHIPPING(48 States)
  3. Custom Scientific - "I" Standard Grade IR Filter - 50mm Round Unmounted

    $295.00
    SKU: CU-50I

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

    FREE SHIPPING(48 States)
  4. Custom Scientific - "V" Standard Grade Filter - 50mm Round Unmounted

    $295.00
    SKU: CU-50V

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

    FREE SHIPPING(48 States)
  5. Custom Scientific - "R" Standard Grade Red Filter - 50mm Round Unmounted

    $295.00
    SKU: CU-50R

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

    FREE SHIPPING(48 States)
  6. Custom Scientific - "U" Standard Grade Filter - 50mm Round Unmountable

    $295.00
    SKU: CU-50U

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

    FREE SHIPPING(48 States)
  7. Custom Scientific - "I" Research Grade Filter - 1.25" Round Mounted

    $175.00
    SKU: CU-125I

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

  8. Custom Scientific - "B" Research Grade Filter - 1.25" Round Mounted

    $175.00
    SKU: CU-125B

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

  9. Custom Scientific - "U" Research Grade Filter - 1.25" Mounted

    $175.00
    SKU: CU-125U

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

  10. Custom Scientific - "V" Research Grade Filter - 1.25" Round Mounted

    $175.00
    SKU: CU-125V

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

  11. Custom Scientific - "R" Research Grade Filter - 1.25" Round Mounted

    $175.00
    SKU: CU-125R

    Wait Time is 3-5 Days

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

  12. Custom Scientific - H-Alpha 656.3/4.5 nm Filter - 1.25" Round Mounted

    $600.00
    SKU: CU-HA45NM-125

    Wait Time is 3-5 Days

    The Custom Scientific H-Alpha 656.3/4.5 nanometer filter is a great accessory for imaging emission nebulae which emit large amounts of the H-Alpha spectral line at a 4.5 nanometer bandpass due to excited hydrogen atoms.

    FREE SHIPPING(48 States)
  13. Custom Scientific - Luminance (IR-Blocked Clear) Filter - 1.25" Round Mounted

    $95.00
    SKU: CU-LUM-125

    Wait Time is 3-5 Days

    The Custom Scientific Luminance Clear assists in CCD imaging because it preserves the visual spectral wavelengths while suppressing the extra Infrared wavelengths picked up by CCD sensors that the human eye can't detect.

  14. Custom Scientific - Luminance (IR-Blocked Clear) Filter - 50mm Round Unmounted

    $150.00
    SKU: CU-LUM-50

    Wait Time is 3-5 Days

    The Custom Scientific Luminance Clear assists in CCD imaging because it preserves the visual spectral wavelengths while suppressing the extra Infrared wavelengths picked up by CCD sensors that the human eye can't detect.

  15. Custom Scientific - Luminance (IR-Blocked Clear) Filter - 50mm x 50mm Square

    $195.00
    SKU: CU-LUM-50S

    Wait Time is 3-5 Days

    The Custom Scientific Luminance Clear assists in CCD imaging because it preserves the visual spectral wavelengths while suppressing the extra Infrared wavelengths picked up by CCD sensors that the human eye can't detect.

  16. Custom Scientific - UBVRI 1.25" Mounted Round Filter Set

    $990.00
    SKU: CU-UBVRI125-SET

    Wait Time is 3-5 Days

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

    FREE SHIPPING(48 States)
  17. Custom Scientific - UBVRI 50mm Unmounted Round Filter Set

    $1,550.00
    SKU: CU-UBVRI50-SET

    Wait Time is 3-5 Days

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

    FREE SHIPPING(48 States)
  18. Custom Scientific - UBVRI 50mm Square Filter Set

    $2,500.00
    SKU: CU-UBVRI50S-SET

    Wait Time is 3-5 Days

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

    FREE SHIPPING(48 States)
18 Item(s)
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Our business began in 1990 as research astronomers came to us to obtain high-performance, high-precision  telescope filters and optics. This was driven in part by the emergence of CCD imaging. At that time it was only large research institutions that could afford the $200,000 + costs associated with custom-building of such large format, digital cameras. Over many years, we perfected our skills and techniques in designing and manufacturing filters that are optimized to function with CCD cameras.

In the mid and late 1990's, as the costs of off-the-shelf CCD cameras dramatically declined so that amateur astronomers could own them, too, we found that those amateur astronomers were also coming to us to obtain high quality filters, just as their researcher "cousins" did. In response to that, we developed and stocked a series of commonly used filters. Although such filters when built for a research astronomer could cost thousands of dollars, by mass production techniques and minor changes in design we were able to lower prices often by more than half.

All of our astronomical filters have IR blocking "built-in" so IR light does not contaminate today's sensitive CCD detectors. When you use filters from Custom Scientific, you do not need any additional IR blocker filters. One exception is in the thickness-matched Clear filters which transmit all wavelengths from the UV to the far IR; they are clear, high-precision, optical windows designed to transmit all wavelengths of light without having to refocus when switching back to a color filter.

The filters offered below are the most commonly-used filters by research astronomers on a limited budget, by astronomy teachers, and by serious amateur astronomers. We also routinely make custom optical filters in other sizes and wavelengths, some of which can be seen on our research astronomy page.  We also do custom filters tuned for fast (low focal ratio) telescopes and Doppler shifted emission lines.