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Daystar Interference Eliminator - Quark to M42

Daystar Interference Eliminator - Quark to M42

by Daystar Filters
SKU DAY-IEQT
$0
$99.00 USD - $99.00 USD
$99.00
$99.00 USD - $99.00 USD
$99.00 USD
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  • Eliminate the Newton Rings
  • +/- 5° Tilt Range
  • Compatible with M42x0.75 17.5m or 12.5mm cameras
  • Camera clocking angle adjustable at 30° intervals
Availability:
2 in stock

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More information

  • Daystar Interference Eliminator - Quark to M42 Overview

    The Daystar Tilt Adapter is a precision-machined optical accessory designed specifically for use with Daystar Quark H-alpha and Calcium filter assemblies. It enables direct mechanical coupling of T-thread (M42x0.75) cameras to the Quark while introducing a tilt mechanism to mitigate interference fringes (commonly referred to as Newton's Rings) during high-resolution solar imaging.

    Unlike generic tilt adapters designed for nighttime use, the Daystar unit provides a maximum tilt angle of 5 degrees, which is critical for solar imaging applications where narrowband etalons are highly susceptible to fringe artifacts. The high tilt capacity ensures sufficient off-axis beam deviation to disrupt etalon-parallel interference patterns at the sensor plane.

    For Quark users conducting imaging work, this adapter is essential to ensure flat, artifact-free solar images. Without it, Newton’s Rings are highly likely, particularly with monochrome sensors and narrowband filters. This adapter is not recommended for visual use.

    Tilt Adjustment:

    • Fully adjustable tilt up to 5°, optimized for solar use
    • Three-point screw system allows controlled plane manipulation without flexure

    Camera Orientation:

    • Clocking angle adjustable in 30° increments via a removable thumbscrew system
    • Aids in cable strain relief and optimal sensor alignment

    Back Focus Support:

    • Native design supports cameras with 17.5mm flange focal distance
    • Includes 5mm spacer ring for use with 12.5mm flange distance cameras

    Mechanical Design:

    • Black anodized aluminum construction for thermal stability
    • Internal threading and matte finish to suppress stray light and reflections
    Comparison Newton Rings with Interference Eliminator

    Understanding Newton’s Rings in Solar Imaging

    When imaging in narrowband monochromatic light—such as Hydrogen Alpha—photographers often observe a wavy pattern of alternating light and dark lines across their images. These are known as Newton’s Rings, also referred to as interference fringes or banding artifacts. They are a result of coherent light reflecting between parallel surfaces within the optical path, often between the sensor cover glass and filter elements.

    In setups with long focal ratios and narrowband filters, the nearly collimated light increases the likelihood of internal reflections inside the camera or sensor assembly. These reflections cause constructive and destructive interference, which manifests as unwanted visible patterns superimposed on the image.

    The Daystar Tilt Adapter addresses this issue by introducing a controlled off-axis tilt to the sensor without shifting the sensor’s center position. This maintains focus, framing, and vignetting, while altering the angle of incidence and the optical path lengths across the sensor. The result is a disruption of the conditions necessary for coherent interference, effectively eliminating Newton’s Rings from the captured image.

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