Photos Matter | Exposure Part 4: Putting it all together
Wednesday, April 24th, 2013
When trying to achieve a correct exposure for your images, it’s important to be familiar with ISO, aperture, and shutter speed. After that, it’s just a matter of how to put them all together!
Remember that exposure has everything to do with light reaching your camera’s sensor, and that each of these three settings regulates the amount of light in some way. Correct exposure is a precise balance between the ISO, aperture, and shutter speed settings. As soon as you adjust one of them, you have to adjust the others to compensate. For example, if you have a correct exposure (just the right amount of light hitting the sensor), but you decide you need a faster shutter speed (which will let in less light), you will have to adjust either aperture (a larger aperture to let in more light), or ISO (a higher ISO to make your sensor more sensitive to the light) in order to maintain your exposure.
{Because this picture was taken outside on a sunny day, you can see that the ISO is as low as it can go, and the shutter speed is very high.}
So, remember:
More light Less light
Higher ISO Lower ISO
Larger aperture Smaller aperture
Slower shutter speed Faster shutter speed
If your image is too dark, or underexposed, you need to choose something from the “more light” column to add more light and get a correct exposure. If your image is too light and washed out, or overexposed, you need to choose something from the “less light” column to decrease the amount of light hitting your sensor.
{Because I wanted to underexpose the couple, and properly expose the bright sky, my shutter speed was really high so I wouldn’t let in too much light.}
So, you’re about to take a picture and you’re ready to adjust your settings… where do you start? You need to decide which setting is the most important for your particular image and adjust that one first. If you are photographing sports, for example, your priority will be keeping your shutter speed high. If you’re photographing a large group of people, you’ll want to make sure you use a small aperture so that everyone is in focus. If you’re indoors, you’re going to want to increase your ISO before you do anything else.
{This image was taken in a large room with very little light. As you can see, I had to bump my ISO way up, use a very large aperture, and keep my shutter speed lower than I normally would while photographing a toddler!}
Once you have adjusted the most important setting, you will adjust the other two settings. Take a few test shots to see how you’re doing. If you’re image is too dark, chose something from the “more light” column above. If it’s too light, chose something from the “less light” column.
{These two images were taken from the same beach, the first on a very bright day and the second on a gloomy, rainy day. You can see that on the gloomy day, I had to increase my ISO, open up my aperture, and decrease my shutter speed to let in more light.}
At first, adjusting your settings will be mostly trial and error, but as you practice, you will get better at judging the different situations you’re in and what settings you’ll need. Remember, there’s not really a “correct” combination of settings. Your settings just depend on the look you’re going for with your image. Don’t get discouraged… practice makes perfect!









































Today I’m going to show you a way to convert your picture without losing the contrast and making you picture look flat. (The screenshots and directions are in Photoshop Elements 5.0.) First open up the picture that you want to convert to black & white. Duplicate the picture by right clicking on the thumbnail in the Photo Bin and selecting Duplicate. This is so you are not working on the original and accidently save over top of it. Press D to set your foreground and background to the default black and white. Make sure that the black is in the top box. If it isn’t press X to switch them.
Now go to the top of the Layers Palette and choose Levels from the Adjustment Layers menu. When the box pops up don’t change anything on it right now, just click ok. This will add a layer to your Layers palette named Levels 1.
Go back to the Layers Adjustment menu and this time chose Gradient Map. Check to make sure the Gradient map is set on black to white. If it is not click on the arrow next to the gradient map and choose the correct gradient from the popup menu. Click ok. This will give you a layer in the Layers Palette named Gradient Map 1. Just going this far will already give you a better black & white picture, but we are not done yet.
In the Layers palette, double-click on the Levels thumbnail in the Levels 1 layer. This will popup the Levels box. From here we are going to edit the individual colors, starting with red. So go ahead and choose the Red channel from the drop down menu. Grab the black (shadow) arrow under the Input Levels and slide it right. This will increase the shadows in the red channel. [IMG]http://i299.photobucket.com/albums/mm313/p_a_sandbulte/red.jpg[/IMG] When you think you are satisfied with this edit, go back up to the drop down menu and choose the Green channel. On this one we are going to slide the white (highlights) arrow to the left.
Again when you are satisfied with this edit, go back up to the drop down menu. This time we are going to work in the Blue channel. Go ahead and move the highlights arrow to the quite a bit to the left. Move the shadows arrow just a little bit to the right. Not every picture you convert will have the same settings, play around with the sliders a bit until you get the effect you are looking for. When you are happy with how your picture looks go ahead and click OK.
One last step and then we are done. Go to the Layers palette, click on More. From that menu choose Flatten Image. This will flatten the adjustment layers into your picture. You can also use ctrl+Shift+E to do this.
Check out the pictures side by side. The one on the left I just used the grayscale mode to convert the picture. Look how much of a difference there is in the one on the right.
Here is my page with my new black & white picture using LDrag’s Blessings of Life and Stolen Moments & Rosy Posy’s Here and Now. 
Here is a sweet one by Chel.
This one by Ophelia uses Jennifer Labre’s Full of Life and True Blue Studio’s Summer Garden Templates.
Here is one from Tamara using Amy Stoffel’s Make a Move.
Challenge reminders: -For the month of September you will receive two points for posting in this thread & in the Saturday Special gallery. You can receive an additional two points for using new Scrap Matters products; please make a note of new products in your post. And at the end of the month you’ll be entered into a random drawing that could earn you some bonus points! -You have until the end of September to complete this challenge for September MOS points or wait to post in October for October MOS points! -Remember no double dipping… layout must be unique to this challenge. -You don’t have to use Scrap Matters products, but remember your SM gallery must contain at least 50% SM product beginning July 8, 2011.

























