Tuesday, October 17th, 2017

Get the perfect exposure… every time!

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Did you ever get back a fresh batch of film, only to be disappointed in finding out that you got back wash-out boring images.

The problem is that you didn’t expose your film properly.

Whether we use a digital or film camera, we need to be able to calculate exposure properly. But first, we need to understand how the aperture and the shutter work together. We also need to know how film handles light, and the relationship between film light sensitivity and f/stops.

Lets take a quick look at the main elements.

Aperture and f/stops: the aperture is an opening in the centre of the lens through which light passes. The amount of light which passes through an aperture is indicated by f/stops. The lower the f/stop the more light that passes through the aperture. Opening up one full f/stop doubles the amount of light entering the camera. F/4 admits twice the light of f5.6.

Shutter: the shutter is a mechanical device that controls the length of time that light is allowed to act on the film. Each time you open the shutter by one, we double the light, when we close down the light by one we half the light. Opening the shutter at 1 second allows twice the light as that of a 1/2 second.

ISO (ASA): stands for International Standards Organisation. The initials are used for film speed which rates light sensitivity. A film with an ISO number 100 is twice as light sensitive as a film with an ISO of 50. The faster the film, the more sensitive it is to light.

Most digital SLR have ISO settings built in to them. If you are taking a low light image with a digital camera use a slow ISO rating of 200 or upwards.

Getting the perfect exposure isn’t easy, but there are several different ways of making it easier.

Using a light meter: there are two types of light meters,

1. Reflected-light meter (the same that is built into your camera) works by pointing the meter at your subject.

2. Incident-light meter: instead of pointing the meter at your subject, you stand beside the subject and point the meter at the camera. The light that falls on your subject will also fall on your meter.

The most common way is to use the meter built into your camera. All modern day cameras have a reflected-light meter built in to them. But don’t point the camera directly at your subject from 10 meters. This will more than likely underexpose your image. Take the exposure reading up-close, then return to the starting position and take your image.

It doesn’t matter which metering system we use, if we don’t point them in the right direction our images will return too dark or too bright. The key is to know where to point the meter.

When I take a landscape image I normally take five or six different readings. I take an incident-light reading with my light meter to record the foreground and a reflected-light reading of the sky.

If you are unsure take three or four images at different exposure settings. Don’t let a perfect picture moment pass by without recording it flawlessly.


Digital Photography Success | Web Article Directory

Where there is no vision, the people perish.
Proverbs 29:18

The earth is the LORD’s and everything in it, the world, and all who live in it; for he founded it upon the seas and established it upon the waters.
Psalm 24:1-2

He makes springs pour water into the ravines; it flows between the mountains. They give water to all the beasts of the field; the wild donkeys quench their thirst. The birds of the air nest by the waters; they sing among the branches. He waters the mountains from his upper chambers; the earth is satisfied by the fruit of his work.
Psalm 104:10-13

Look at the birds of the air; they do not sow or reap or store away in barns, and yet your heavenly Father feeds them. Are you not much more valuable than they?
Matthew 6:26

How many are your works, O LORD! In wisdom you made them all; the earth is full of your creatures. There is the sea, vast and spacious, teeming with creatures beyond number living things both large and small.
Psalm 104:24-25

Sometimes I do get to places just when God’s ready to have somebody click the shutter.
Ansel Adams

When you photograph people in colour you photograph their clothes. But when you photograph people in B&W, you photograph their souls!
Ted Grant

While there is perhaps a province in which the photograph can tell us nothing more than what we see with our own eyes, there is another in which it proves to us how little our eyes permit us to see.
Dorothea Lange

When words become unclear, I shall focus with photographs. When images become inadequate, I shall be content with silence.
Ansel Adams

Your first 10,000 photographs are your worst.
Henri Cartier-Bresson

You don’t take a photograph, you make it.
Ansel Adams

Beauty can be seen in all things, seeing and composing the beauty is what separates the snapshot from the photograph.
Matt Hardy

Nothing happens when you sit at home. I always make it a point to carry a camera with me at all times…I just shoot at what interests me at that moment.
Elliott Erwitt

Which of my photographs is my favorite? The one I’m going to take tomorrow.
Imogen Cunningham

You’ve got to push yourself harder. You’ve got to start looking for pictures nobody else could take. You’ve got to take the tools you have and probe deeper.
William Albert Allard

If I saw something in my viewfinder that looked familiar to me, I would do something to shake it up.
Garry Winogrand

I always thought good photos were like good jokes. If you have to explain it, it just isn’t that good.
Anonymous

Twelve significant photographs in any one year is a good crop.
Ansel Adams

It can be a trap of the photographer to think that his or her best pictures were the ones that were hardest to get.
Timothy Allen

 


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