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Skip to content Celestron EclipSmart 10 Pack

Apertura 1.25" Lunar & Planetary Filter Set #1

(10+ Available)
SKU: APT-A-LPSET1
$29.95

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Apertura Lunar & Planetary Kit
Includes Blue, Green, Red and ND91 1.25” Filters

This Apertura 1.25” filter set includes the 80A Blue, 58 Green, 25 Red, and a Neutral Density ND96-0.9 Filter in a plastic storage container. All of these filters require telescopes with apertures of around 8” or more to be most productive. While you can use a telescope with less light-gathering power, all but the brightest objects will appear too dim to show much detail. For scopes under 8”, we recommend filters with higher transmissions, such as those included in our Apertura Lunar & Planetary Kit #2.

Colored filters can be an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue.

80A Blue Filter - 30% Transmission - A blue filter is useful for the observing the Great Red Spot on Jupiter, or to enhance the boundaries between the giant planet's reddish belts and their adjacent bright zones. A blue filter is also helpful when studying surface features and polar ice caps on Mars, or to improve Mercury's surface markings at twilight, when the elusive planet is low on the horizon. When observing Saturn, a blue filter will enhance low-contrast features, such as those found between the belts and zones. Checking out a comet? Use a blue filter to bring out definition in its gaseous tail.

58 Green Filter - 24% Transmission - A green filter can help you see the Great Red Spot on Jupiter, as well as lunar features on the Moon. Mars observations are enhanced pretty much across the board, including the polar ice caps, low clouds, and dust storms. You can also more easily see the cloud patterns on Venus with the #58 green filter, see white features in Saturn's atmosphere, and observe brighter comets.

25 Red Filter - 14% Transmission - A red filter will help with daytime observations of Venus and Mercury by darkening the blue sky. When observing Jupiter and Saturn, you can expect a red filter to help you study clouds that have a bluish hue. Mars will also benefit from a red filter in several ways. It will enhance polar ice caps as well as surface details, and will also sharpen the boundaries of yellow dust clouds.

Neutral Density ND96 Filter - 13% Transmission - A neutral density filter is great for looking at the Moon or other bright objects, such as Venus, without changing the color. It will dim the light coming to your eye so that you can see more detail. This ND Filter, which is sometimes called a Moon Filter for obvious reasons, has a density value of 0.9.

All of the Apertura 1.25” filters are made of high quality, solid plane parallel glass that has been anti-reflection coated to prevent glare and ghosting. They have a full 26mm clear aperture, and are mounted in a black anodized aluminum cell that is threaded on both sides to fit most eyepieces and stack with each other.

Please note that the effectiveness of these filters depends on several factors, including the aperture and focal length of your telescope, the magnification being used, and the seeing conditions at the time.

This Product Comes with the Apertura Absolute Warranty!

  • Two-Year Warranty against product defects.
  • Three-Year Accident Replacement Program that begins after your initial 2 year warranty expires.
  • Your Apertura Absolute Warranty is transferable.

Download a copy of the Apertura Absolute Warranty for more information on this program, how to make a claim, and why it is important to keep your original receipt and the product's original boxes & packaging!