04/09/2023
Got Noise?
Here's a question for you: Have you ever taken the time to look at the actual file size of your images? I am not talking about the pixel dimensions, but the megabytes. If not, do it. You might be surprised that the numbers are all over the place. It doesn’t matter that you’re shooting with the same camera, or that the images are all from the same day, or even the same shoot. Chances are, you will find quite a bit of variability in the amount of information contained inside each individual photograph.
One image might be 100mb. The next, 81mb. The following, 20mb. The maximum file size that you can capture with your images is, of course, dictated by the resolution of your camera. Naturally a 50-megapixel camera will have larger files than a 16-megapixel camera.
But sometimes it doesn’t.
So, why, if you are shooting with a 50-megapixel sensor in your camera, are you bringing home images that are sometimes the same size or less than those from your old 16-megapixel camera?
The answer to this lies in the thing that your camera’s sensor was designed to capture: light.
In digital photography, light is information.
Your camera is not capturing the life force of an animal, it is capturing the light reflecting off that animal.
Recording light is the primary job of our imaging sensors. The more light you have, the more information you have, the larger the file size you have to work with. Likewise, the less light you have, the less information you have, the smaller the file sizes.
But none of this has anything to do with the amount of available light you had to work with when creating the photograph. The fact that the sky was overcast or sunny, or it was dawn, or noon, or an hour after sunset is completely irrelevant to all of this. Instead, it’s about the amount of light you ALLOWED your camera to capture.
You see, all of this is a choice – whether you realize it or not at first. You make a choice every time you trip your camera’s shutter as to how much information you are going to record and therefore how big and clean your files are. Which, by the way, bigger file sizes are better.
This choice comes in the form of your exposure. How large or small is your aperture? How high is your ISO? What about your shutter speed? All these things come together to dictate how much light your camera’s sensor will record.
So, if we can agree that more information is better, why would you make the conscious decision NOT to capture the biggest and most information packed files possible? Why would you consciously degrade your photographs in the field?
Continue Reading:
https://www.photowildmagazine.com/got-noise