Omegon variable polarizing filter 1.25″
Looking for a way to have real control over the contrast and brightness of what you observe? The Omegon variable polarizing filter 1.25″ gives you exactly that - stepless adjustment of light transmission from as little as 1% up to 40%, all without swapping filters or reaching for any additional accessories. A simple twist of your fingers and the image instantly adapts to your needs and the current observing conditions.
How it works
The filter consists of two interlocking polarizing elements - one fixed and one rotating. As these two layers are turned relative to each other, the angle of polarization of the passing light changes, and with it the resulting light intensity. The outcome is a perfectly smooth darkening transition with no steps or color shifts. This principle, well known from photography and filmmaking, has been precisely adapted here for astronomical and visual observing needs.
Design and compatibility
The filter uses a standard thread for 1.25″ eyepieces, so it fits virtually any common eyepiece or rotating filter turret. Handling is straightforward even with gloves on during cold nights - something any observer who has spent more than one winter evening outside will truly appreciate.
What can you observe with it?
Moon and planets
The most common use is observing the Moon and the planets of our solar system. A bright full Moon can make detailed study of its surface nearly impossible - the polarizing filter reliably cuts down that excess light, suddenly revealing crater details, especially those near the terminator where oblique illumination creates striking shadows. You will appreciate the filter equally when looking at Venus, Jupiter's cloud bands or Saturn's rings - wherever excessive brightness washes out contrast, this filter steps in to help.
Terrestrial observation
The filter is also excellent for terrestrial use through a telescope or spotting scope - whether observing wildlife, landscapes or distant objects in strong sunlight. Variable adjustment is invaluable in such conditions.
Solar observation - important safety notice
Observing sunspots and solar activity is possible with this filter, but a fundamental safety rule applies here: a polarizing filter must never be used as the sole protection when viewing the Sun. It must always be combined with a certified solar filter placed over the front of the telescope. Only this combination provides the necessary eye protection while also allowing comfortable fine-tuning of the contrast on the solar disk.
About Omegon
Omegon is a brand focused on practical and affordable astronomical accessories for observers of all levels - from beginners to experienced amateur astronomers. Their variable polarizing filter is no exception: it brings functionality that was once the preserve of professional observatories and makes it accessible to anyone who wants genuine control over their observing session. Careful construction, standard dimensions and simple operation make this filter a reliable companion at the eyepiece - whether you are watching the Moon from your garden or planning a detailed documentation of planetary surfaces.
Key features at a glance
- Stepless light transmission adjustment from 1% to 40%
- Two interlocking polarizing elements - one fixed, one rotating
- No color shifts or stepping during adjustment
- Standard 1.25″ thread - compatible with virtually all common eyepieces
- Easy to handle even with gloves on
- Suitable for lunar, planetary and terrestrial observation
- Can be combined with a certified solar filter for solar viewing
Specifications
| Parameter |
Value |
| Filter size |
1.25″ |
| Light transmission range |
1% - 40% |
| Filter type |
Variable polarizing (two-element) |
| Thread |
Standard 1.25″ eyepiece thread |
| Recommended use |
Moon, planets, terrestrial observation |
