I understand how shutter speed would catch fast moving objects better and reduce motion blur. I also understand how lowering it would lead to brighter images. However, why is decreasing shutter speed better for brightening images as opposed to other methods, even a virtual transformation. Does the relationship between the pixels dramatically change for most pictures?
Boomaa23
@aidangarde I'd imagine that the method of decreasing shutter speed was developed before digital cameras and as such before we could apply transformations to images in real time (or at least, accurately and reproducibly). I'd imagine that nowdays we use this method because if you perform a transformation you will brighten the entire image and distort it, whereas if you capture the original image in a brighter manner you may get a different image. Take, for example, the shadow of a person on a dark background. At a certain brightness you'll probably not be able to see the person, and brightening the image with a transform will still keep the same contrast. Instead, brightening by reducing the shutter speed might let you see that person's shadow by capturing more of the original image.
llejj
To brighten images, decreasing shutter speed has advantages over virtual transformations like ISO, since it has better signal to noise ratio
I understand how shutter speed would catch fast moving objects better and reduce motion blur. I also understand how lowering it would lead to brighter images. However, why is decreasing shutter speed better for brightening images as opposed to other methods, even a virtual transformation. Does the relationship between the pixels dramatically change for most pictures?
@aidangarde I'd imagine that the method of decreasing shutter speed was developed before digital cameras and as such before we could apply transformations to images in real time (or at least, accurately and reproducibly). I'd imagine that nowdays we use this method because if you perform a transformation you will brighten the entire image and distort it, whereas if you capture the original image in a brighter manner you may get a different image. Take, for example, the shadow of a person on a dark background. At a certain brightness you'll probably not be able to see the person, and brightening the image with a transform will still keep the same contrast. Instead, brightening by reducing the shutter speed might let you see that person's shadow by capturing more of the original image.
To brighten images, decreasing shutter speed has advantages over virtual transformations like ISO, since it has better signal to noise ratio