Photography/camera question...?

Question

i've used a camera a lot but dont know the details about it, i dont get what iso means or is when it comes to cameras?

Answer 1

ISO is a standard for defining sensitivity to light.  The higher the number the greater the light sensitivity.  It was formerly known as ASA or an equivalent European standard called DIN.

In the day of film each type of film was assigned specific ASA/DIN values by the manufacturer.  This provided the basis for adjusting light meters or Auto Exposure systems to use the proper exposure settings.  In modern Film and Digital cameras the ISO is the newer definition that replaced ASA.  For a digital camera the ISO setting defines the image sensors sensitivity setting, sort of like a brightness setting on a video system.

The higher the ISO setting the less light required to record an image but the quality of the recorded image will be lower.

Answer 2

Hi, try this as you'll find a linear (it starts at the beginning and moves from there so you don't miss any key info) training course covering all aspects of imaging skills.  

There are 700 free tutorials which will explain words like ISO, how to get your exposures right and much more:

http://www.image-nut.com/spip.php?rubriq...

Answer 3

ISO generally refers to the sensitivity of film to light. With digital cameras, it sort of means the same thing, the sensitivity of the CCD or CMOS capture devices to light.

Setting the ISO higher in your digital camera allows you to shoot indoors without a flash, enables the camera to increase the shutter speed, so that you can freeze motion more easily. Why wouldn't you set the ISO higher all the time?

In the digital camera, this sensitivity is boosted electronically, and there are serious trade-offs when boosting the ISO. You get more noise and artifacts, the higher you boost the ISO.

One of the better articles I've seen explaining this, is here:

http://www.dpreview.com/articles/compact...

If you are wondering what ISO has to do with film speed, as in a 35mm camera, check out this article:

http://www.photonhead.com/beginners/film...

Answer 4

Have you read your camera instruction Manual?You should enter its homepage for more details

Answer 5

ISO determines how much light gets in. I'm not exactly sure myself what the technicalities of it are. I do know you use a higher ISO at night and a smaller ISO during the day. An ISO of 80 is usually appropriate during midday and areas with a lot of light....or when you're using a flash. An ISO of 800 and up is used for night shots where there's little to no light. An ISO of 100, 200 or 400 is good for dark areas indoors or in very shady areas. When using a high ISO it's good to use a tripod. (I *think* the higher the ISO, the longer the shutter stays open) so any kind of movement at all will cause a lot of blur. So definitely use some kind of sturdy surface when using an ISO of 200 and up. Also, the higher the ISO, the more grain you'll get. Not sure why....but that's what I've noticed.