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