Blurred Portrait Backgrounds
Wow! We have all seen that image, the subject took over the image and the background was just a blurred delight. At times I have been more in awe of the background of a portrait then the portrait itself, it’s not supposed to work that way right? But as a photographer I wanted to examine the entire image to see what works for portrait photography.
Let’s talk about Camera Settings for Portraits
The aperture setting controls the depth of field therefore, it’s the aperture that you use that will give you the variance in the background of your portrait.
The higher numbered apertures will give you less light and more detail in the background. i.e. f8/f11 etc
The lower numbered apertures will give you more light and more blur (or bokeh) in your background. i.e. f/2.8, f4 etc
It’s the lower aperture that you usually want to choose when taking portraits. This is called having a shallow depth of field.
Remember if you are taking portraits of more an one person who are not at the same distance from the camera, you will need to increase your aperture value to ensure that all the subjects remain sharp. i.e. for two people you may choose f/5.6, for a group you may try f/11 or more. This is called increasing the depth of field.
What about shutter speed?
When you are shooting with low aperture values, keep an eye on your shutter speed as you don’t want to get too slow with this. I have found that 1/60’ is the lowest that most people can hand-hold a camera with lens in the range 24mm to 70mm and obtain sharpness in their focus. There is a "rule of thumb" which says 'never go slower than your focal length'. For example a 200mm lens means no slower than 1/200'; or a 100mm lens means no slower than 1/100'. There is some lee-way if you have a steady hand.
Why adjust the ISO?
If the combination of the aperture and shutter speed still does not give you enough light in your image you may need to increase the ISO. As a general rule an ISO of 100 or 200 can be used on a clear day, if the day becomes cloudy or overcast you may need to change the ISO to 400, if the light is very low you may need to move your ISO up to 800, 1200 or higher. The quality of modern dslr can hand high ISO very well before the effects of noise ruin your image.
Which lenses are best for portraits?
Of course this depends on what you have in your kit. Choose a lens that you have that has the lowest AV (aperture value). In regards to focal length, my personal favourites are:
- 85mm, the glass is sharp and the background blur is magnificent.
- The 70-200mm is also an excellent lens for portraits.
- In the studio I love the versatility of the 24-70
Remember focusing on the eyes adds great impact to your photograph, combined that with blurred backgrounds and you will have an all round winner!
…I will talk more about the eyes in my next blog.
Talking about backgrounds, have you notice our brand new product? Backgrounds Pictures that you can wow your clients with.
‘never stop learning – this is where you will find your contentment’