Published 20 February 2009
Tags: Aperture, Brightness, Depth, DoF, Exposure, Field, ISO, Motion Blur, Photography, Shutter Speed, Stops, Triangle
In previous beginner speak
posts I have written about aperture
, shutter speed
and how they affect your photos. Understanding each of those aspects of photography is necessary to have creative control over your shots. “So what is this Exposure Triangle
?” I hear you ask. The exposure triangle explains how the individual aspects of exposure (aperture, shutter speed and ISO) affect the final exposure of the photo.
What is exposure though?
The technicalities of exposure are rather convoluted and a bit mathsy, however the end result is that exposure refers to how bright or dark your photo is due to the amount of light that is recorded by your cameras sensor. A properly exposed photo should (normally) resemble the brightness of the original scene. A poorly exposed photo will either be too dark or too bright and may contain areas that are so dark or bright that they contain no detail (know as blown out). So how can we control the exposure of a photo? That is where the exposure triangle comes in.
What is the exposure triangle?
Continue reading ‘The Exposure Triangle – In Beginner Speak “The End of Auto Mode”’
In my post about whether to buy a DSLR or not I noted that one of the plus points was that it could shoot RAW. But what is it? What difference does it make to my photos? Should I use it? There is a lot of opinion out there on this issue so I went back to the facts to make my own mind up.
What is RAW?
RAW is a file format that your camera can use to save your photos, you have probably hear of JPEG which is probably the other format your camera can use. JPEG files have the extension .jpg but, confusingly, RAW files have different extensions set by your camera’s manufacturer. My Olympus creates .orf, Nikons .NEF and Canons .cr2. So how is a RAW file different from a JPEG? The RAW file is just that, raw data straight from the camera’s sensor where as a JPEG file has had all of the camera’s settings applied to it to process the image into a use-able format. The JPEG image has also been compressed to a smaller size by discarding some of the RAW data it no longer needs now the settings have been applied. The flow chart below is probably the easiest way to describe it.
Continue reading ‘Should You Shoot RAW?’
Continuing the series of posts where I try to explain some of the basic concepts of photography in “beginner speak”. If you like the concept, have anything to add, any futher questions or want to suggest another topic then let me know. Either add a comment below or email me.
ISO is often referred to when discussing the settings used to obtain a correct exposure but what is it, what affect does it have on your photos and when do you need to change it?
ISO actually stands for International Standards Organisation who are a group that define univeral standards in industry so that everybody is working from the same hymn sheet. What does this have to do with photography? Not a lot. The reason we use the term ISO is because the organisation defined the standard for the sensitivity of 35mm film called the ASA. Anyway enough of of pointless facts, what does it affect in my photographs.
Continue reading ‘ISO – In Beginner Speak “Fast or Slow Film”’
Motion blur is one of my favourite effects when shooting digital photographs. When it all comes together it can look really spectacular. Done well it can look like a very difficult shot to achive but in reality it’s not that hard a process. In my next post I get into some detail about how to control motion blur with shutter speed but before that here are two of my favourite motion blur shots and some details about how I took them.
Continue reading ‘Motion Blur’