Photo Lesson Overview on CGIPix.com
CGIPix is an observation that Nikon, Canon and the rest no longer make cameras,
they make computers that you can attach a lens to.
Here is a basic overview of what it takes to create good, better or best pictures, you decide how much effort you want to put into your pictures.
The meanings of ISO and Film Speed:
Using External Meters
The built in metrs on a camera are very accurate, but they can be easily fooled.
If you are taking a picture of a very bright subject, such as snow, or a dark subject, such as a black car, the the camera's built in meter will show its limitations.
The best way around the limitations of the internal meter is to use an external meter to take reading for light, flash and color.
If you are using a zone system of exposure, than a spot meter is the preferred choice.
Types of Light Readings
There are two types of way to read the light on a scene, reflected or incident.
Reflected light readings are what a camera's built in meter does, or a spot meter.
The meter reads the light hitting the subject, and being reflected back at the meter.
This is why reflected meter readings can be off, white reflects more, black reflects less.
Incident meter readings are taken of the light falling on a scene.
It won't matter if the subject is bright or dark, the amount of light falling on it will always be the same.
This is why an incident light meter is standard equipment for many professionals.
The subject can't fool the camera, and the exposure readings are much more accurate.
A light meter can be a basic piece of equipment, with no battery required.
The meter will read the light hitting it, and that will charge a circuit and move a needle to the correct exposure.
These were the first versions of light meters, and are still available on the used market today.
The modern light meters are extremely accurate, with a digital readout in 0.1 F stops.
If you're taking a picture of a black car, you hold the light meter next to the car, push the button, and see the readout.
Once you have the readout, you plug the values into your camera.
Most modern light meters have a built in flash meter function.
You can hook a PC sync cord to the flash meter to fire strobes, or set the flash meter to take a reading when the strobes are fired.
Advanced functions allow you to trigger a strobe multiple times, and the meter reads the total amount of ambient and flash lighting during the exposure time.
Spot meters are the standard for zone system shooters. The zone system breaks a scene down between darkest and lightest portions of a scene.
The "true" exposure value is not as critical as the exposure value that will allow the medium to capture the lightest and darkest parts of a scene accurately.
So if you have a scene with dark shadows, you could be overexposing by a stop or so to keep everything in the scene properly exposed.
With a spot meter, normally taking a 1 degree reading, you make multiple readings, to determine the lightest and darkest part of the scene.
From there, you decide if it's possible to shoot the scene and have everything properly represented on the medium.
Most zone shooters are using 4x5 view cameras. A digital shooter will be able to use HDR (High Dynamic Range) to extend the range of a scene.
Color meters are the expensive meters.
A good color meter will give you a direct readout in the degrees Kelvin of a scene, and then you can set that number into a digital camera, or use color correction filters.
Some color meters have built in flash meters, to accurately measure the color of a flash unit, or a combination of flash and ambient lighting.
Using a Light Meter
Any time you start using a light meter and shooting manually on a regular basis, you see that your exposures are much more accurate.
The light meter is giving you a precise reading of the light falling on the scene, rather than the less accurate reading of the light being reflected into the camera's meter.
Here are the guidelines for using any pictures from this site:
If the image is stated as being a COPYRIGHTED IMAGE, then it cannot be used. A link MUST be placed from the page that the picture is used, either to Home Page, Thumbnail Page or to the photo's Gallery Page.
The link can be a text link at the bottom of the page, or the picture can be a link.
There is a limit of 10 (Ten) photos that may be used from this website on another single website. After 10 (Ten) photos, permission must be obtained to use additional photos.
Keep the name of the picture as it was originally named, without changing it.
The images on this site are all sized at 400 x 600, that is the size limit for using them on any other website.
The Desktop Backgrounds are for personal use only, and are not meant to be put on a website, unless they are resized at 400 x 600.
You can use the images for commercial, personal, professional or any type of website.
If it's a commercial website, remember that you don't have a model release, so if it's a picture with someone in it, and they are prominently featured, you can't use it without a model release.
When it's a picture of scenery or anything where the people are not identifiable, then you can use it freely.
The "MODELS" pictures are all PREMIUM images. They cannot be used without permission.
It's not a requirement, but send me an e-mail if you use a photo.