Neutral – as the name suggests this filter helps in reducing the light that passes through your camera in a very uniform manner. Neither too less nor too more. There is wonderful quote by Peter Hill. He says An ND filter is to a camera lens what a pair of sunglasses is to a human.
Purpose – While shooting the camera lens has to face a huge amount of light. This light affects the clarity of the picture. Using a neutral density filter can be of great help to reduce this light that the camera lens has to face. Neutral density or as we better know ND filter is very useful in shooting some special images. Images of waterfall, architectural monuments etc are some of them. If you are not using the ND filter you will end up with foggy images of the same. ND filter also assist you when you are using flash function for close ups.
Recognition – The look of ND filter is not very appealing. It has very simple looks with dull grey color. It does not really accessories your camera but its natural grey color keeps it unaffected and helps in reducing the amount of light that passes through the lens of the camera.
Uses – In photography the evenly distribution of light is very important .the photographer has to have greater controls in exposure times. Using a neutral density filter can solve all such problems. The most important part of this filter is that it acts as a barrier to the light that reaches the lens of the camera. It is used in featuring some special photographs of waterfalls, landscapes, monuments etc. without this filter it is not possible to get clear pictures of such sites.beleive me using this filter really helps! Though its look is not so appealing but it really work wonders making the pictures look awesome.
Calculations – Physical density and mathematical notations are the two systems used to measure the reduction of light by a neutral density filter. The purpose of the former system is to identify the quantity of diluted light shooting the film plane and the latter identifies the use of the filter mathematically.
Conditions – There are certain conditions as to where to use the neutral density filter. It is not advisable to use this filter on a shinning day and also at dim areas. Know you filter well as you know your camera. Understand the ifs and buts of the filter you use and then there’s no looking back, you will see your filter works wonders.