HDRI

HDRI to high dynamic imagery Allows a greater range between the light and dark areas of an image. What the range is dynamic for is that the different values of light can be modified to make an image more aesthetically appeasing. With advances in modern day technology almost any camera that allows over and under exposer can be use to create HDRI. In order to create a true HDRI image you most have an under expose and an overexpose image and a few in between to create and HDRI images. In order for it to work the image must be the exact same position.

ISO

What is ISO?
ISO determines how much light the camera will let into an image. A low ISO will make the image dark and hard to see were as a higher ISO will let the image be lighted however as a side effect of a higher ISo the image apperars more grainer. ISO is best used with shutter speed for if you have a low ISO and let the cameras shutter stay open longer you will let light in but it will not be to much light. Higher ISO are used for low light conditions such as night portraits and concerts. In short you most have a balance between the three settings aperture ISO and shutter speed in order to get the desired results.

Shutter speed

Shutter speed effects how much light i let in to the photo before the shutter closes a fast shutter speed allows you to capture motion pictures such as a bird flying or someone running a slower shutter speed allows you to focus where the subject is still such as portraits and landscaps. A perfect example would be this devilishly handsome and really fit man jumping over a rail. I used a really fast shutter speed that to a picture in 4000 frames per second and was able to take the photo like I froze time.

What does the aperture change in a photo?

Aperture changes a photo by determining how much light is let in before the shutter closes and takes the picture. It also deals with a depth of field in small aperture everything in the photo is in focus in a larger aperture you can make it focus on the foreground or the focus on the background

Rule of thirds