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  • Optolong 50,8mm variable polarizing filter Optolong 50,8mm variable polarizing filter

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Optolong 50,8mm variable polarizing filter

Product code: OPTPOLVAR508

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Quick Overview

The Optolong variable polarizer filter 50,8mm is composed of two filters that can rotate one relative to each other. In this way you can select the amount of light that pass through the filter: 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.

Availability: In stock

Regular Price: €60.00

Special Price €51.00

22% tax incl
if you pay by bank transfer €49.47

Details

Technical specifications:
Allows you to vary the transmittance of the filter
Suitable for use for viewing bright objects like the Moon
Anti-reflective multi-layer coating to not generate ghost images
Quality substrate not to introduce aberrations in the images
Available in 2 versions: 31.8mm (1.25") and 50.8mm (2") diameter

 

How to use the filters:
Our filters are always available in 2 diameters: 31.8mm and 50.8mm. These standards are commonly used by telescopes and their accessories. For example, depending on their function, they can be used with a CCD ora A DSLR camera (using appropriate photo adapters), but also screwed to optical accessories such as eyepieces or diagonals. Warning: 31.8mm filters do not work with 50.8mm diameter accessories and vice versa (unless there are special adapters). When you choose the version of your filter, be careful to choose the diameter compatible with your equipment.

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