THE COMPLEXITIES BEHIND THE EXPOSURE TRIANGLE

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When I started photography , one of the first things I learnt about was the exposure triangle {ET}. Most photographers( especially those who use manual mode on their cameras) should be aware of the term exposure triangle. For those not aware, the triangle consists of : the shutter speed, the ISO and the aperture. In another blog, I will go into details of each member of the ET.

The relationship these three members have has driven me multiple times to watch several videos on how to set them appropriately. I will not say that I have gotten to a conclusion on how this three relate to each other, but so far I have discovered that before an image is made, at least two of the members must be taken into consideration. 

The thing is, they all control the amount of light that comes into the camera, but in different ways. So with the way the aperture regulates the amount of light, it tends to affect depth of field. With the way the shutter speed regulates the amount of light, it tends to affect the motion blur or sharpness of the image. Also, with the way the ISO regulates the amount of light, the grains on the image will be affected. 

One can take two images with two different ETs and they will come out with approximately the same exposure but the results will still differ(apart from the exposures now). Taking a look at these exposure triangles: 
              1. ISO-400, F-9, S- 1/125 ; 
              2. ISO-800, F-14, S- 1/125,

                what can one notice? In the same external conditions, these ETs give almost the same exposures ( I'm using the NIKON D7000 by the way). The main differences between the results will be that (2) will have more grains than (1), and (1) will have a smaller depth of field( area in focus) than (2).

NOTE: One might have assumed that all the members of the ET will differ for (1) and (2) but its not always the case. Just because the ISO of (2) doubled (1) doesn't mean the case should be applicable for the other two members. Most times, when trying to get the same exposure with different settings, it is just two members that should be tampered with, while one remains constant. 

The exposure triangle is a part of photography that must not be neglected. I have to say that no matter how experienced one is in photography, it is almost impossible to master the ET accurately. 
              
   

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