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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
SVBONY SV139 1.25" ND3.0 Neutral Density Moon Filter
SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"
SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"
SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"
SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"
SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"
SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"
SVBONY SV139 1.25" ND3.0 Neutral Density Moon Filter

SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25"

par SVBONY
UGC SV-W9108D
$9.59 - $9.59
$9.59
$9.59 - $9.59
$9.59
Égalisation de prix!
  • ND0.6 Neutral Density Filter
  • Standard 1.25-inch Barrel Size
  • Reduces Glare from the Moon and Bright Planets
  • Fully Multi-Coated Optical Glass
  • Black Anodized Aluminum Cell
En rupture temporaire
Alerte de retour en stock
Info disponibilité
Admissible à la livraison GRATUITE aux USA pour les commandes de plus de 350$.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • SVBONY SV139 1.25-inch ND0.6 Neutral Density Filter

    The SVBONY SV139 1.25-inch Neutral Density filter provides a fixed ND0.6 light reduction, dimming the view without altering its natural color. This filter threads directly into any standard 1.25-inch eyepiece, making it an essential tool for comfortably observing the Moon and reducing the overwhelming brightness of planets like Venus and Jupiter.

    ND0.6 Transmission: Taming Lunar Glare for Comfortable Viewing

    Observing the Moon, especially near its full phase, can be uncomfortably bright through a telescope, leading to eye fatigue and a loss of subtle detail. The SV139's ND0.6 density reduces the incoming light to a comfortable level, allowing you to study lunar maria, rilles, and crater walls for extended periods without squinting or losing your dark adaptation.

    Multi-Coated Glass in a Standard 1.25" Cell

    Constructed with fully multi-coated optical glass set in a robust aluminum frame, the SV139 filter minimizes internal reflections and glare. The standard 1.25-inch barrel is threaded on both sides, allowing you to stack it with other filters, such as a color filter for enhancing planetary details.

  • What does ND0.6 mean for the SVBONY SV139 filter?

    ND0.6 indicates the filter's optical density. An ND0.6 filter transmits 25% of the light that hits it, effectively reducing the brightness by two f-stops. This is a moderate level of dimming, ideal for reducing the Moon's glare in most amateur telescopes without making the image too dark.

    Should I use the SVBONY SV139 ND filter or a variable polarizing filter?

    The SV139 is a fixed-density filter, offering simplicity and slightly higher image fidelity due to fewer optical surfaces. A variable polarizing filter allows you to adjust the brightness, which is useful for different lunar phases or telescopes of varying aperture. For a straightforward, effective solution for lunar viewing, the SV139 ND0.6 is an excellent choice.

    Will the SV139 ND0.6 filter be too dark for observing Jupiter's moons in my 8" Dobsonian?

    For an 8" telescope, an ND0.6 filter will dim Jupiter's dazzling disk, often enhancing the visibility of its cloud bands. However, it will also dim its Galilean moons significantly. While they should still be visible, you may prefer to observe the moons without the filter and use it only when studying the planet itself at high magnification.

    Can I use the SVBONY SV139 1.25" filter for astrophotography?

    Yes, this filter is very useful for lunar and planetary imaging. It helps prevent the camera's sensor from becoming saturated by the Moon's brightness, allowing for more controlled exposures. This can be particularly helpful when trying to capture faint "earthshine" on the dark portion of a crescent Moon.

    Is the SV139 ND0.6 filter dark enough for the full Moon in a 120mm refractor?

    Yes, for a telescope around 120mm (5 inches) in aperture, the ND0.6 filter provides a very comfortable view of the full Moon. It strikes a good balance, cutting the intense glare while leaving enough light to see fine details clearly at various magnifications.

    How do I attach the SVBONY SV139 filter to my telescope?

    The SVBONY SV139 has standard 1.25-inch filter threads (M28.5 x 0.6mm). You simply screw it into the bottom of the barrel of any standard 1.25-inch eyepiece. You then insert the eyepiece into your telescope's focuser as usual.

  • Brand SVBONY
    Size ND0.6
    Barrel Size 1.25 in

    • SVBONY SV139 1.25" ND0.6 Filter

      × 1

    • Plastic Storage Case

      × 1

  • SVBONY 1-Year Warranty