The FaderLux Viewing Glass is a multifunctional pan glass or gaffer's glass for DoPs, Gaffers, Film Electricians and First ADs.
It can be used for checking contrast settings, for lamp adjustment and for F Stop / ND calculation.
The integrated UV - protection makes it a very suitable device for calculating cloud - sun intervals.
When turned to the darkest position, the FaderLux Viewing Glass provides 99% UV protection.
The Viewing Glass´s density can be steplessly regulated by turning the knurled ring, so that you can freely choose the grade of translucence.
Engraved onto the outside of the fixed ring is a scale marked from 1.5 to 7, which indicates by how many Stops the light transmission is reduced.
You can read the current setting by using the mark on the knurled ring.
The scale on the Viewing Glass corresponds to the ND scale as follows:
1.5 = ND 0.3 - 0.45
2 = ND 0.6
3 = ND 0.9
4 = ND 1.2
5 = ND 1.5
6 = ND 1.8
7 = ND 2.1
This makes it very easy to measure the required ND levels, i.e. for gels and filters.
Any additional 52mm photographic filters can simply be screwed onto the FaderLux Viewing Glass (or 40,5mm onto the Mini).
For example, you might add extra ND filters or colour filters for checking your light on film sets with green and blue screen, or for checking contrasts in black and white.