Photography skills.
Aperture.
Exposure is determined by three thing: aperture, shutter speed and ISO.
Aperture relates to how much light passes through the camera lens to the image sensor, it depends on how open the lens is.
I took a picture of the same thing here but changed the aperture each time to see what the different outcomes would be as i change it.
Shot 1.
Shot Information.
Focal Length: 35.00 mm
Exposure: 1/60 sec; f/4.5; ISO 400; Manual; Pattern metering
Image Size: 3984 × 2656
Orientation: 1 (Normal)
Resolution: 72.00 Pixel per Inch
Flash: Did not fire
Shot 2.
Shot Information.
Focal Length: 35.00 mm
Exposure: 1/60 sec; f/13; ISO 400; Manual; Pattern metering
Image Size: 3984 × 2656
Orientation: 1 (Normal)
Resolution: 72.00 Pixel per Inch
Flash: Did not fire
Shot 3.
Shot Information.
Focal Length: 35.00 mm
Exposure: 1/60 sec; f/29; ISO 400; Manual; Pattern metering
Image Size: 3984 × 2656
Orientation: 1 (Normal)
Resolution: 72.00 Pixel per Inch
Flash: Did not fire
Shutter speed.
This is defined as how long the shutter hole is open or how long the aperture remains open. This is proportional to the amount of light that reaches the film or image sensor. When changing the shutter speed, you need to ensure it is exposed correctly. To do so, you need to change the aperture and the ISO to get the right exposure and ensure a good picture. A faster shutter speed creates a shorter exposure while a slow shutter speed creates a longer exposure.
Freeze action.
Motion blur.
ISO.
ISO is the level of sensitivity of your camera to available light. Typically ISO numbers start from 100-200. On some cameras, it can reach 23400 and higher. With these higher numbers, it can operate in very low light conditions. They go up in increments of two or doubling each time. The component within a camera that changes sensitivity is called the 'image sensor'.
Base ISO- typically the lowest ISO number of the sensor that can produce the highest image quality without adding noise to the picture.
By understanding this increasing power of two ratio, we can calculate the effect increasing ISO will have on exposure times.
E.g. ISO 200= 1/2 A second
ISO 400= 1/4 a second
ISO 800= 1/8 a second.
When a sensor is sixteen times more sensitive to light, it means that it needs sixteen times less time to capture an image.
Noise (grain).
Higher ISO, whcih you may need when shooting in low light, is the main cause of noise. the higher the ISO, the more noise shows in the image.
You can make a feature out of noise, ut can add interest and feeling to images.
