asif vai chalen prothom thekei suru kori..sabai jate bujte pare sei vabe..
what is the most important thing that a photographer must remember when taking a photo
wow Asif vai dekhi valo student paisen!!!!!!!!!!
don\'t worry ami o asi. ya as a student.......
me three... but where is Asif Bhai????
Well theres plenty of places to start at.. you could start at composition but you also need to know about the basic technical issues..
I\'ll try to give a brief summary of the most basic of technical aspects..
let me just try to find a good lesson from the web and post it for you guys in here.. writing it by myself would be too big a hassle..
Aperture
Also known as the diaphragm or lens opening. The aperture controls the amount of light allowed onto the film. It also influences the depth of field . This is a very important factor to keep in mind and is therefore discussed seperately.
A camera is equiped with a setting mechanism to control the size of the aperture. (On instant cameras the lens opening and shutter speed are fixed.)
The aperture is also reffered to as the F-stop or F-number. The F-stop indicates how many times the diameter of the lens opening can by divided into the focal length. In short this means that a smaller lens opening will have a higher F-number. If the photographer want to allow less light into the camera he must use a higher F-number. A higher F-numer (smaller aperture) will increase the depth of field.
A setting on the F-stop ring is also known as a STOP. Each stop allows exactly half or double the amount of light onto the film, depending on the side to which the setting is changed.
On automatic cameras the aperture can be set automatically according to the prevailing light conditions. This will then be dependant on the light conditions, the shutter speed setting and other settings available on the camera. For our purposes we will only look at the effect of the aperture setting, while the shutter speed is fixed.
The first photo shows the picture taken at optimum exposure settings. The second was taken with a smaller aperture(larger F-stop value). The third photograph was taken with a larger aperture (smaller F-stop value).
Shutter Speed
The shutter speed refers to the amount of time that the shutter of the camera is open and the film is exposed to the light. The speeds available on a camera depends on the design of the shutter and camera. Normal settings will include speeds of 1 to 1000.
A shutter speed of 1 indicates that the shutter will be open for 1 second. A setting of 2 will indicate that the shutter is open for half (1/2) a second. On a setting 60 the shutter will remain open for one sixtieth (1/60) of a second, etc. Each setting on the shutter speed is also known as a STOP. Each STOP will expose the film for exactly half or double the amount of time, depending on the side to which the setting was done.
Hand speed limit
The hand speed limit is the minimum shutter speed at which a photograph can be taken without supporting the camera on a tripod. At lower shutter speeds camera shaking can influence the sharpness of the photo. A safe rule to follow is to ensure that the shutter speed setting is higher than the focal length of the lens. (As an example, for a focal length of 50mm, the shutter speed setting would be 1/60th of a second and for a focal length of 200mm the shutter speed setting would be 1/250th of a second.)
Movement
If a moving subject is photographed at a high shutter speed (1/500th) the subject will appear as \"frozen\" on the photograph. If a lower setting is used (1/60th) the subject will appear as \"flowing\" on the photograph.
If the camera is moving as in a moving vehicle, higher shutter speeds should be used. If the lighting conditions do not allow higher shutter speeds, a film with a higher film speed should be used. Moving subjects can also be \"frozen\" at lower shutter speeds by following the moving subject with the camera (Panning). The background will then have a \"flowing\" appearance.