When iOS 8 appears later this month photographers will get new and intuitive editing tools. One important update to the Camera app is what Apple calls Smart Adjustments. The adjustments can be grouped into three categories: adjusting light, adjusting color, and fine tuning.
After you capture your image you can edit it from the Photos app or, as usual, select your last photo taken right from the Camera app. Once you are in edit mode, you'll see a button that looks like a volume control that controls the smart adjustments. To adjust the light, you swipe up and down a series of miniature renderings of your photo sliding up to lighten, down to darken. Once you have the brightness about where you want it, you can continue to edit or save the image.
Adjusting color is similar. You can make the color very saturated or take it all the way to monochrome, simply by swiping through a number of small thumbnails. Both the lighting and color adjustment screens also have a drop-down menu that allows even more detailed adjustments. Once your image is monochrome, for example, you can change the tone which may enhance the sky and clouds, increase contrast, and change other parameters. It's all pretty intuitive, as long as you are willing to look at the screen and select the buttons that present more options.