Good morning, my dear photography lovers!
It has been a long time since I wrote anything here, so it’s time to get back to work on the blog and keep learning about photography. And what better topic than learning the difference between pixels and dots per inches?
This is an important topic for two reasons:
1. When we’re looking for a new camera, as the number of pixels will give us an idea of the sensor’s resolution.
2. When we’re exporting a picture, because depending if the picture is going to be published on the Internet, or print it, we’ll have to check and use one or the other.
Let’s start then: What’s a pixel? Well, a pixel is the most basic unit on a digital image, a pixel is each of the dots that make up an image. If we amplify a picture, we end up seeing a number of little dots, each one of them is a pixel. Obviously, the more points you have in an image, more information, therefore, a bigger resolution.
Then, what are the dots per inch? These, also called DPI, are a way to meassure how much paper we’ll need to print a picture. This means that when we export our edited RAW picture to a format to print, we’ve got to take into account the dots per inch and not only the pixels. The number tells us the density of ink points per inch of paper, f. ex. 300 dpi will be 300 dots of ink in each of the paper’s inches.
This means that if I wanted to publish my pictures in a digital format, I would keep the dpi at 72 (aprox. as it is usually the standard for the screens) and I will change the pixel size, depending on the size I want it to be on the screen. On the other hand, if I want to print, I would usually export it on 300 dpi so the resolution on paper is good, and you can’t see all the little dots.
This is what you need to know and change in general lines, regarding what and where you’re gonna publish, you will need to check the number of pixels or the dpi you are going to need to use.
I hope this post helped you a little bit and if that’s not the case… well… write me a comment and I will answer as best as I can!