** Dr.Logic [Sweat Box & Soap] WP 2000 3.1 **
Comments made On Photography...
Camera Hand Held Metering ...
There are two types of hand held meter to consider the reflected light and the incident light type. Sometimes they are dedicated types but usually the two functions are combined. Better meters will also have a flash meter function. The incident type measures the light falling on the subject, the reading only varying with the brightness of the light. The reflected type measures the light reflected off the subject so effectively reads the brightness of the light and takes into account the subject’s reflectivity. The flash meter will measure the flash test burst and give a reading of the aperture to use...
When cameras started to get electronic the meter was built into the body peering through its own hole in compact cameras and inside the body effectively peering through the lens for Single Lens Reflex (SLR) cameras. So the first meters in SLR's are incident light meters with the same basic problem, that is, they sum up the whole scene and make an exposure based on the assumption the whole scene is an average 18% grey...
Camera Exposure modes …
Modern cameras often have a number of “manual and automatic exposure modes” intended to help the photographer get the best pictures without worrying too much about some of the technicalities and effects of shutter speeds and aperture values.Your other creative camera control is the aperture (opening) on your lens. We measure the size of the opening using f-stops. Each f-stop is twice as large or half as small as the one next to it. f/1.4, f/2.8, f/3.5, f/4.0, f/5.6, f/8, f/11, f/16, f/22, f/32...
Why bother with all this? As you go higher in f-stop numbers, you increase the front-to-back distance (depth of field) in your photograph. Thus, if you take a picture at f/22 (a very small opening), you’ll have most of your picture in focus. A way to remember this is as you go higher in f-numbers; more of the picture is in focus...
Going back to our faucet analogy, the challenge with increased f-number (smaller aperture) is that less light comes in through the lens. So you must compensate with a slower shutter speed. Most of the time you will be safe in using mid-range camera settings. In sunny mid-day conditions, you can use an f-stop of f/8 and 1/250 of a second and do just fine with ISO 100 film. Automatic and inexpensive box cameras and many digital cameras are preset to such aperture/shutter speed combinations...
Camera ISO Speeds ...
Many newer cameras allow you to set them to either shutter-priority or aperture-priority modes. Typically, use shutter-priority for sports or action photography to ensure high shutter speeds with telephoto lenses. Use aperture-priority for landscapes.Film “speeds” vary according to the sensitivity of the chemicals in the film. Films with bigger ISO numbers 100, 200, 400, 800, 1600, 3200, (such as 400) are more sensitive to light, so they’re great when you work with low-light photographic situations or you have to do sports photography…
Comments made On Photography...
Camera Hand Held Metering ...
There are two types of hand held meter to consider the reflected light and the incident light type. Sometimes they are dedicated types but usually the two functions are combined. Better meters will also have a flash meter function. The incident type measures the light falling on the subject, the reading only varying with the brightness of the light. The reflected type measures the light reflected off the subject so effectively reads the brightness of the light and takes into account the subject’s reflectivity. The flash meter will measure the flash test burst and give a reading of the aperture to use...
When cameras started to get electronic the meter was built into the body peering through its own hole in compact cameras and inside the body effectively peering through the lens for Single Lens Reflex (SLR) cameras. So the first meters in SLR's are incident light meters with the same basic problem, that is, they sum up the whole scene and make an exposure based on the assumption the whole scene is an average 18% grey...
Camera Exposure modes …
Modern cameras often have a number of “manual and automatic exposure modes” intended to help the photographer get the best pictures without worrying too much about some of the technicalities and effects of shutter speeds and aperture values.Your other creative camera control is the aperture (opening) on your lens. We measure the size of the opening using f-stops. Each f-stop is twice as large or half as small as the one next to it. f/1.4, f/2.8, f/3.5, f/4.0, f/5.6, f/8, f/11, f/16, f/22, f/32...
Why bother with all this? As you go higher in f-stop numbers, you increase the front-to-back distance (depth of field) in your photograph. Thus, if you take a picture at f/22 (a very small opening), you’ll have most of your picture in focus. A way to remember this is as you go higher in f-numbers; more of the picture is in focus...
Going back to our faucet analogy, the challenge with increased f-number (smaller aperture) is that less light comes in through the lens. So you must compensate with a slower shutter speed. Most of the time you will be safe in using mid-range camera settings. In sunny mid-day conditions, you can use an f-stop of f/8 and 1/250 of a second and do just fine with ISO 100 film. Automatic and inexpensive box cameras and many digital cameras are preset to such aperture/shutter speed combinations...
Camera ISO Speeds ...
Many newer cameras allow you to set them to either shutter-priority or aperture-priority modes. Typically, use shutter-priority for sports or action photography to ensure high shutter speeds with telephoto lenses. Use aperture-priority for landscapes.Film “speeds” vary according to the sensitivity of the chemicals in the film. Films with bigger ISO numbers 100, 200, 400, 800, 1600, 3200, (such as 400) are more sensitive to light, so they’re great when you work with low-light photographic situations or you have to do sports photography…
posted by charles fuller @ 2:10 pm
0 Comments:
Post a Comment
<< Home