Archive for February, 2010

Using UV and Circular Polarizing Filters

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In this first post I’m going to demonstrate the Polarizing and UV Filter. So as I mentioned on the main page the Polarizing filter is used to get rid of glare and unwanted reflections.
The simple diagram represents the basics the causes of glare or reflection.

polarizing light

Light is made up of different waves – different frequencies produce different light colors. An example of one cycle is shown on the left hand side of the diagram. If you could turn the page so the edge of it is facing you then the wave would look like a vertical line. If the combination of Red, Green and Blue (which makes up white in photography) waves are all traveling (as in the bottom right example) either vertically or horizontally then the light is known as being polarized and that is when reflections occur. The Polarizer filter blocks or filters out this light minimizing or eliminating (depending on the circular polarizer settings) the reflections or glare.

Digital Camera Equipment

What I’m using on this demo is not expensive digital camera equipment. The idea is to appeal to everyone who is looking at experimenting with camera lens filters and it doesn’t have to be just for top notch equipment users only. Experimenting with lens filters can be good fun as well as controlling the quality of light entering the camera lens and on future videos it’s my intention to have a look at the variety of color filters that are at our disposal.

The Digital Compact Camera: Konica Minolta Dimage Z2 which is known as a Digital Compact SLR. It features a 45-mm lens and a multitude of controls and features that I will discuss in the future.

Camera Filters

As far as I am aware there are no filters that will directly fit onto the 45-mm lens so a converter is required so that 52-mm lenses and filters can be used with this camera.

The UV Filter is used to filter out the unwanted Ultra Violet light which in turn reduces the haze and washed out appearance  of the photo as you can see in the photos below.

without camera lens filters

Without any Lens Filter

ultraviolet filter fitted

UV Filter on Lens

For the next set of pictures I am using a 52 mm polarizing filter which is attached to the converter and onto the camera lens. By turning the outer ring I was able to achieve the following results.

Photo Filter Results

The following photos show the results of using a Circular Polarizer Filter with its different settings.

polarizer with minimum filtering

Polarizer Filter set to its Minimum Setting

circular polarizer with more filtering

Polarizing Filter with about 50% glare reduction

circluar polarizer with half filtering effect

Circluar Polarizing Filter with 75% filtering effects

polarising filter with maximum effect

Full Polorized Effect

No circular polariser

Without a Polarizing Filter

with a polarizer to minimize glare and reflection

Full Polarization to Reduce Glare

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