Omegon Filters Variable grey filter 1.25"
Product no.: 7399
Manufacturer: Omegon
$ 35.95
plus shipping costs
Product description:
Variable polarizing filter 1.25''
Allows for selective adjustment of brightness – which is useful for terrestrial observation and objects of the Solar System.
You often find considerable differences in detail brightness on objects of the Solar System. This is particularly noticeable when observing:
- Moon craters which are close to the lunar terminator
- Sun spots and faculae. Caution: only to be used in association with an appropriate solar filter on the front of your telescope!
- Details on planets
Irradiation from brighter regions prevents you from distinguishing fine details. Variable polarizing filters allow you to selectively adjust the level of darkening.
Light transmission:
Light transmission of polarizing filters is between 1% and 40%. These filters have a very large range of effectiveness.
Handling:
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.
Omegon Filters Variable Polarising Filter 2"
Product no.: 15631
Manufacturer: Omegon
$ 64.95
plus shipping costs
Product description:
These high quality anodized aluminium, optical glass variable polarising filters reduce the amount of light entering your eyepiece. You can progressively dim the view when observing a bright object, such as the Moon or certain planets, to a level according to your needs, whilst increasing contrast, reducing glare and increasing the amount of detail that can be studied.
The light transmission can be varied from 40% down to as little as 1%. The filter will not change the colour of the object being viewed and will prevent eye fatigue and loss of night vision. Each filter set consists of two polarizing filters, one which can be rotated in its cell to adjust the brightness.
The filters, used as single elements, can also be used for daytime terrestrial use for reducing sunlight glare from lakes oceans or window glass. Available in two sizes, threaded to fit either standard 1.25" or 2" astronomical eyepieces. Supplied with storage case.
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