Chroma Technology manufacture the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.

Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f/4 or smaller.

SII filters isolate the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm).

Chroma Technology SII filters are available in the following filter sizes:

  • 1.25″ Mounted
  • 2″ Mounted
  • 31mm Unmounted
  • 36mm Unmounted
  • 50mm Unmounted
  • 50x50mm Square Unmounted

Optical Density Data:

All transmission and blocking (OD) data are actual, measured spectra of representative production lots. Spectra varies slightly from lot to lot. Optical density values in excess of 6 may appear noisy because such evaluations push the resolution limit of low light level measurements.

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Chroma Technology SII 3nm Bandpass Filters

SKU: N/A

$1,055.00$2,845.00

✅ Fast Shipping & Tracking
✅ Stocked in Melbourne, Australia
✅ Expert Advice
✅ Lifetime Technical Support

    Need Expert Advice?

    Visual Astronomy, Astrophotography, Microscopy and Macro Photography can be a little complicated sometimes as there are a lot of options. If you'd like to check something before you purchase just let us know and we'd be happy to help!

    Enquire now or call us (03) 9042 2293

    Chroma Technology SII 3nm Bandpass Filters

    SKU: N/A

    $1,055.00$2,845.00

    Chroma Technology manufacture the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.

    Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f/4 or smaller.

    SII filters isolate the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm).

    Chroma Technology SII filters are available in the following filter sizes:

    • 1.25″ Mounted
    • 2″ Mounted
    • 31mm Unmounted
    • 36mm Unmounted
    • 50mm Unmounted
    • 50x50mm Square Unmounted

    Optical Density Data:

    All transmission and blocking (OD) data are actual, measured spectra of representative production lots. Spectra varies slightly from lot to lot. Optical density values in excess of 6 may appear noisy because such evaluations push the resolution limit of low light level measurements.

    Reviews

    There are no reviews yet.

    Be the first to review “Chroma Technology SII 3nm Bandpass Filters”

    Your email address will not be published. Required fields are marked *

      Need Expert Advice?

      Visual Astronomy, Astrophotography, Microscopy and Macro Photography can be a little complicated sometimes as there are a lot of options. If you'd like to check something before you purchase just let us know and we'd be happy to help!

      Enquire now or call us (03) 9042 2293