Here's just some quick notes i got from
this tutorial.
DSLR -
Digital Single Lens Reflex Apperture: (f/value)
1. The apperture of the lens is the diameter of the lens opening.
2. The larger the diameter, the more light reaches the image sensor.
3. The smaller the f-stop, the larger the apperture.
4. To use a faster shutter speed(1/250) to freeze action, you have to open up the apperture.
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Flowing water - slow shutter speed so that the water blurs
Slower shutter speed , close down apperture to allow less light in (avoid overexposure).
Depth of field - the distance where in objects are in focus.
1. Select a large apperture (small f-value) f/2.8 to obtain shallow DOF (Background blur and isolate subject / Allow user of faster shutter speed)
2. Select a small apperture (large f-value) f/8.0 to achieve great DOF (Landscape picture, foreground and background is in sharp focus )
Exposure Bracketing: (-1/3EV)
1. Use to ensure properly exposure of pictures, especially in challenging lighting situations.
Bright sunlight/ snow - overexposed (+1/3EV) over exposing the surrounding but properly exposing the main subject
Dark - under exposed (-1/3EV)
Sunset - Slightly under exposed
Correct Exposure:1. To 'freeze' fast action, you need to use a fast shutter speed.
2. a small aperture increases depth of field;
3. a slow shutter speed requires a tripod, or other ways to hold the camera steady (e.g. by bracing yourself against something).
ISO:aperture/shutter speed combination required for correct exposure:
1. small hose, longer time required to fill the bucket;
2. to use a shorter time to fill the bucket, we needed to switch to a larger hose.
3. ISO = speed of water (we increased the amount of light falling on the sensor)
Noise:Why are DSLR images almost noise-free? The answer is simple: a larger image sensor!
* A slow or long exposure introduces noise.
* A higher ISO introduces noise.
* Noise Reduction Software will clean up the noise in some images, and sometimes it's done well enough that you can't really tell the original image had unacceptable noise level in it.
* If you must have the option of using high ISOs (e.g. to capture fast action in low-light situations), then get a DSLR.
Fireworks Shutter Speed - 3 sec
Apperture - 4.7
ISO - 80
Shooting mode - Night Scene
Tips:
1. use tripod because you'll be using slow shutter speed
Other tips:
1. Frame your picture
The use of a frame can turn an otherwise plain picture into a pleasing one. Usually a foreground element is used to create the frame. Examples are an overhanging tree branch, a window frame, a door, arches, a fence, rows of trees, etc.
2. Area Focus
