1.25" Orion 25% Transmission Moon Filter
by Orion
List Price:
Our Price: $14.99
Availability: Usually ships in 1-2 business days
Category: Digital Camera
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Digital product summary information
Manufacturer: OrionProduct features:
- A specialty Moon filter especially useful for increasing contrast during waning and waxing crescent phases
- Allows transmission of 25% of incoming light
- Reduces bright glare reflected off the Moon and boosts contrast and resolution of lunar surface features
- Threads directly into Orion 1.25" telescope eyepiece barrels
- Provides a brighter view than our 13% Moon filter by blocking less light - ideal for use with smaller telescopes
Digital camera reviews of 1.25" Orion 25% Transmission Moon Filter
Digital camera Review: Makes the moon much easier to see
Summary: 5 Stars
This filter is used in telescopes for observing the moon. The moon is so bright under magnification by a telescope that details can be washed out, making it difficult to observe interesting details. In addition, too much light can mess up your night vision, something you want when looking at the night sky through a telescope. Think of this as "sunglasses for the moon". (However don't forget to remove it when looking at other objects or they'll be too dark!)
This is the one that you want for typical small powered telescopes - defined as 5" in aperture or less for the primary, or objective, lens. The more commonly available 13% transmission filters are for the "big boys" - telescopes that have an aperture of over 6". If you use a 13% filter on a small telescope you'll be filtering out too much light and the moon will appear way too dark. There are also variable transmission filters that use two polarizing lenses. But they are way more money and most backyard family telescopes are well served by this filter alone.
One note: this filter is used for eyepieces that are 1.25" in size. This is one of the most common sizes for telescopes but check yours to be sure first. It does not have to be an Orion telescope - any brand will do as long as the eyepieces are 1.25". Also make sure that your eyepieces have threads on the bottom inside of the tube, as this filter screws into the bottom of your eyepieces.
Summary of 1.25" Orion 25% Transmission Moon Filter
Transmits 25% of incoming light. Ideal for viewing crescent Moon phases and for smaller-aperture telescopes, for which less dimming is required.Filters
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