An ISO range is how much a camera can electronically brighten a photo. It can be anywhere from 80 all the way up to 12,800. The only problem with higher ISO is the fact that when you use higher ISO it creates noise in the image making the quality of the photo deteriorate.
The functional opening is the aperture, the opening that controls the amount of light that hits the photosensitive surface. You may have a camera with interchangeable lenses that screw into and out of the camera's body. The opening into which the lens is screwed is not the aperture.
ISO stands for International Standards Organisation, it comes from when the sensitivity of films became standardised. It refers to the speed that your camera responds to light. The higher the ISO number the more sensitive the film or digital sensor is to light. If you choose to use a lower ISO(lower sensitivity) setting you will have to have a longer exposure, this is known as slow film. Fast film is when you have a higher sensitivity and a faster exposure. A higher ISO setting allows a faster shutter speed with the same aperture setting, this means the picture will have less Blur. The downside it that the Higher the ISO the more noise (or grain) your image has.
The ISO speed, shutter, and aperture are all interconnected. There is never necessarily one "correct" setting for all 3. However, if you're not shooting on a tripod, you probably want to set your shutter speed to 1/60 to reduce camera shake. To eliminate grain, you may want to keep your ISO below 400. It may be cloudy on a rainy day, so you may be able to shoot at f/8 or f/11. Of course, on most digital cameras you could select a shutter priority (meaning the camera will adjust the aperture for correct exposure at a shutter speed of 1/60) and then set your ISO to 400. The camera will automatically meter the scene and set the aperture correctly.
If the camera has a "shutter priority mode", usually called "S mode", then the shutter speed is controlled directly by the user when the camera is in this mode, by moving a dial or pressing a button (or both). If the camera has a "manual" mode, usually called "M mode", then the shutter speed and aperture are both controlled directly by the user by moving dials or pressing buttons (or both). Some cameras have automatic modes which allow the user to control the minimum and maximum shutter speeds that will be selected by the camera when considering all other factors. If the minimum shutter speed is reached, the camera will increase the ISO or aperture size to compensate for under-exposure. If the maximum shutter speed is reached, the camera will decrease the ISO or aperture size to compensate for over-exposure.
Lots of camera enthusiasts in forums online will agree that the Canon SD850/950 IS is the best camera to use in a low-ISO environment.
The lowest ISO in a camera is about ISO 50.
ISO settings indicate the sensitivity of a DSLR camera. Most DSLRs offer 100 to 1600 ISO settings. The highest end cameras feature settings from 50 to 3200 or even 6400 ISO. The Kodak DCS digital camera is the highet ISO camera on the market with 6400 ISO.
It's how sensitive the film is to the light. Which is measured in ISO. If you use a film camera. The film box should say what ISO it is. If you have a digital camera, you can adjust it in certain modes in the menu. For more details you can check out http://www.geofflawrence.com/photography_tutorial_ISO_film_speed.htm
Experimenting is the best way to get a perfect exposure, but for starters, get a tripod and try 10 sec. at F/8, ISO 100. Improvise from there, and you'll have great pictures.
High ISO pictures will tend to generate more noise, but the camera and lens used will have an impact when doing comparisons. Camera ABC may have a full frame sensor and a fast lens, and can thus hit ISO of 3200 with no problem, whereas camera XYZ has an APS-C sensor and a consumer lens and produce the same amount of noise at only ISO 800.
ISO 2000 is not a standard ISO value for camera settings. Typically, ISO values in photography range from 100, 200, 400, 800, 1600, and so on, doubling the sensitivity with each increase. ISO 2000 is an uncommon value but can be used in some camera models to achieve a higher sensitivity to light in low-light conditions.
the brightness setting
Tutorials on how to set the ISO on a camera can be found on several sites that provides tutorials such as Veoh, Youtube, Dailymotion, Online Tutorials and many more.
Any Camera can be used in the dark with a flash, however if your wish to take a picture without a flash many things come into play. First you need a camera that you can set the ISO speed, Aperture, and Shutter Speed. This is best with a digital SRL Camera. Depending on the lighting set the Aperture at the larges opening wich will be the lowest f number. Set the ISO at the highest setting (1600 or higher if available). and I like to start with a shutter speed of 1/100. Then play with the setting depending on conditions. When shooting at the high ISO speed your picture may get "noise" undeveloped points. It takes alot of practice to get the right settings. I prefer on my camera to set it on shutter priorty TV and let the camera set the aparature size. But i still start with at least a ISO setting of 800.
An ISO range is how much a camera can electronically brighten a photo. It can be anywhere from 80 all the way up to 12,800. The only problem with higher ISO is the fact that when you use higher ISO it creates noise in the image making the quality of the photo deteriorate.
An enthusiast can start with a camera which offers at least control of fundamental variables like aperture, shutter speed, ISO, white balance, flash (on/off). Later on one can go full steam with purchase of Digital SLR and lenses.