We discussed the use of filters this week. It’s advised that you buy a 77mm filter as this will cover all sizes of lenses that you have. You should also buy step up rings which attach to the filter and allow you to use it with other lenses

step_up_rings_small
Step up rings can be bought as several different sized rings that increase one step at a time, or you can buy one ring to suit our lens and filter

 

 

Variable ND (Neutral Density) filters

In week 7 we looked at Neutral Density (ND) filters. These are essential when taking long exposures in the daylight. If you buy the variable filters, you change how dark they are by turning them

 

UV (Ultra Violet) filters

These filters protect your lens and have no effect on the photograph

 

Polarising filters

These prevent reflection. They decrease reflection from non metallic surfaces. You turn the filter until you see the reflection disappear. If you take a photo of a window, the filter eliminates your reflection. If the sun is shining on a leaf, the glow can be eliminated. You can also use the filter to get rid of the reflection on water, allowing you to see what is happening under the water.

under_water

I haven’t had much success with my polarising filter on glass. It hasn’t given me the result I was expecting. There is still a lot of reflection remaining in my windows though it isn’t as bright, and the window to the right has completely lost the reflection so you can clearly see the curtains

Polariser02_small
Before
Polariser01_small
After

Similarly, the TV screen does turn darker but doesn’t hide the reflection completely:

Polariser03_small
Before
Polariser04_small
After

This filters cannot be used for skies – they are only for getting rid of reflection. They will however also wok a bit like ND filters and make the photo darker. The filter may appear to saturate colour but this is only because it’s taking off the shine – it’s not actually affecting the colour.

These are the filters and step up rings that I have:

Filters_small

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