What is resizing in photography?

Being photographers, we are often privy to the word “Resize”. And it is often mentioned to resize a photograph to a particular dimension. So, resizing basically means converting a photograph from that dimension to a smaller dimension, without changing any of the visual aspects in it. In simple terms, resizing just means to reduce the pixels in the photographs.


Sony Alpha A 9 DSLR camera delivers a dimension of 6000*4000 px as it’s image dimension. A Canon 5D MK III delivers an image dimension of 5760*3840 pixels and multiplying 5760 by 3840, we get 22118400 pixels which in turn becomes 22.1 Megapixels.


Every photograph/digital image comes with a dimension. You can find the dimension of the photograph by right-clicking on the image and choosing “properties” as shown in the image below.

What is resizing?

“Properties” window

But the catch is, an image file having a dimension of 6000*4000 would be 240,00,000 pixels, in other words, 24 million pixels or 24 megapixels. Generally, this file(jpg) comes at a file size of 10~16 MB. And the file size varies based on parameters like exposure, colour values, compression/conversion algorithm and other finer details of the image.


Resizing plays a major role here as it would take a long time to transfer a file at the size of 10 MB and above. For digital display purposes and mail transfer purposes, you might need to resize the image to a size of 1600 px by 1066 px(aspect ratio 3:2) which in turn will directly reduce the file size to around 1 MB. You see the difference?

What is resizing?

“Image sizing” tool panel in Lightroom’s export window

Converting from a larger dimension to smaller dimension without cropping or adding up anything to the image is called “resizing”.  The result is that we get a smaller size file which helps us in transferring the files in a quicker manner.

You don’t need the full resolution photograph which is sized around 6000*4000 px or 5760*3840 pixels except when you want to use them for printing purposes.

Trust this post about resizing gives clarification about bringing down the size of a photograph and the direct relationship with the dimensions of the file and it’s size.



Notify of
For Latest Updates

all we need is ...

Subscribe now
ebook on "Five tips for processing photographs in Lightroom to become a better photographer"