Hey there all, its been quite sometime for me since I posted in something new, so here goes!
A filter, in definition is something, some device or contraption, which will restrict or modify transmission. In terms of a camera, optical filters, are used to selectively transmit light depending on the need. There are various types of
filters in use, special effects, close up, Neutral Density(ND), gradient, etc.
I ll talk about some of them here.
The most commonly used one is a UV filter. Expected to cut down the incident UV rays, but at times, is responsible for unwanted reflections and lens flares. I use it mainly as a lens cap.
The special effects ones, provide a variety of different effects to the photos. They can shapes, words, starbursts etc
that are the results of the special effects one. Few examples
and a DIY here…http://wp.me/P4EGyN-1l
The close up filters are basically magnifying glass. Check the post here…http://wp.me/p4EGyN-2y
The other type, the ND filter is a particularly useful too if and when used during the day time where you want to both depict or soothe out motion. I know it sounded confusing, how do i depict motion and also soothe it out. Well, we dont do both in a single photo. Suppose you take a photo of a fountain and there are people moving in front of it. Use the filter, decrease the shutter speed and there you have it, the moving people are hardly visible. On the flipside, as the people are soothed out, the water too, will become smooth and flowy. You wont get the sharp droplets anymore, it ll become more of a dreamy smooth and flowy substance.
So, what the ND filter basically does is, it cuts out the incoming light without changing the color balance of the scene, a sunglass to your lens.
Gradient filter is a type of ND filter where half of the glass is darkened, this is commonly used while shooting
landscapes to darken out the sky, helps in proper exposure of the complete scene. Another costlier filter variation of the ND filter is the circular polariser filter. Here the strength can be varied by rotating the polarised glass discs.
In the following photos, observe the difference in shutter speed before and after using the filter.
These photos should explain how the end result is. In the first one, the outline of the car is visible.
In the second set, water ripples are visibly reduced in the second shot.
I hope you, my dear reader will take amazing shots using this type of filter. Do share.
The ND filters are not cheap things to come by…but you can always make one for yourself! How?? Check it out on the DIY page, Innovation Corner (https://senkaustav.wordpress.com/iinnovate/)