• Adjustable polarizing filters are the luxury version of Moon filters. It is composed of two filters that can rotate one relative to each other. Rotating one filter relative to the other continuously adjusts the amount of darkening.
• Most polarizing filters allow light transmission levels from 1% to 40%. They can be used to set the optimal balance between light level and contrast for the size of telescope you are using.
• It is therefore particularly useful in observing the Moon where it is necessary to change the transmissivity of the filter as a function of magnification with which you look at the Moon. In fact, with increasing magnification, the light that reaches the eye or the recording camera decreases and then the transmissivity of the filter must be increased.
Mount material: Aluminium This variable polarizing filter has a Aluminium material mount, which makes it difficult to be broken.
Adjustable brightness Irradiation from brighter regions prevents you from distinguishing fine details. Variable polarizing filters allow you to selectively adjust the level of darkening.
Reduce glare It reduces glare for improved perception of detail and for better viewing comfort.
You often find considerable differences in detail brightness on objects. This is particularly noticeable when observing:
- Moon craters which are close to the lunar terminator
- Stellar spot and faculae. Caution: only to be used in association with an appropriate filter on the front of your telescope! - Details on planets
This variable polarizing filter has a Aluminium material mount, which is sturdy and durable.
It helps you to adjust the brightness effectively. The variable polarizing filter allows for selective adjustment of brightness, which is useful for terrestrial observation.
These filters have a very large range of effectiveness. Light transmission of polarizing filters is between 1% and 40%.
Variable polarizing filters are made up of two individual filters. The variable darkening effect is produced by rotating the lower filter relative to the upper one. And it reduces glare for improved perception of detail and for better viewing comfort.
Fit all 1.25" eyepieces with the standard filter thread.