NWTC-Marinette - On-Line Syllabus -Computer

AEL
Automatic Exposure Lock
AFL
Automatic Focus Lock

Steve’s Digicam Review of the Olympus E-1

http://www.steves-digicams.com/2003_reviews/e1_pg5.html

AEL - AFL Setting Menu:

"This allows you to combine the AEL (AE Lock) button function with the functions performed by pressing the shutter release halfway (focus lock and AE lock) depending on your preferences."

Diopter
"Wear eyeglasses? Want to shoot photos without them? Buy a digital camera with an adjustable diopter lens. Slight adjustments can improve clarity and sharpness when looking through the viewfinder."

Digicam Help For Beginners & Beyond

http://www.digicamhelp.com/camera-features/camera-parts/diopter.php

SSWF
Olympus E-500 Super Sonic Wave Filter

"The camera incorporates a dust reduction function to keep dust from getting on the image pickup device and to remove any dust or dirt from the image pickup device surface with ultrasonic vibrations. Every time the Olympus E-500 is activated the dust reduction starts working. The SSWF indicator will blink while dust reduction is working."

ISO

"ISO Sensitivity Auto; ISO 100, 200, 400, 800
Equivalent ISO sensitivity expresses the speed of photographic negative materials (formerly expressed as ASA).

Since digital cameras do not use film but use image sensors instead, the ISO equivalent is usually given.

What ISO denotes is how sensitive the image sensor is to the amount of light present. The higher the ISO, the more sensitive the image sensor and therefore the possibility to take pictures in low-light situations.

And, where you would have needed to physically change to a different roll of film if you wanted a different ISO speed, digital technology allows you to simply dial one in. In this way, you can record images taken at different ISO speeds on the same memory card."

Photoxels.com Digital Photography Tutorials
http://www.photoxels.com/tutorial_iso.html

Metering

"Lightmeters in modern (digital) cameras are intelligent enough to automatically determine the correct exposure for most
shots so the photographer can concentrate on composing the image. They all work on the principle of measuring reflected
light from the subject. The three most common types are discussed here."

"Center-weighted metering assesses the whole image area but assigns the most importance to the central 40 to 60%.
This system is accurate in average lighting conditions, but can be fooled by excessively dark or light areas."

"Spot metering only evaluates a small area in the center of the viewfinder so you can meter for a specific detail of the
scene (e.g. when photographing a subject against a bright or dark background)."

"Matrix-metering divides the image area into many small segments and analyses the readings for the best possible
exposure. It is remarkably accurate in most situations."

"Automatic exposure modes work fine for most scenes, but the meter can only see scenes as neutral gray and
compensates for any deviations accordingly. So you should know when to override the meter's results. If the subject contains
more than average dark or light tones you should take a substitute reading of an average gray area, lock that exposure and
then recompose the image and release the shutter."

"Green grass or medium blue sky are good examples of average gray".

DCVIEWS.com Digital Camera Tutorials
http://www.dcviews.com/tutors-t.htm?tt53415

Exposure Compensation

"A camera's exposure meter is always calibrated at the so-called middle gray level, which means the gray color
that is in the middle between complete white and complete black and reflects 18% of the incoming light. When
you point your camera at your subject and take a meter reading, the meter will consider the intensity of light being
read as middle gray. This creates problems! Suppose most areas in your scene is white, say snow covered. The
exposure meter will treat that white area as mid-gray. When you take your shot, the white area looks grayish. The
image below (click on link to see images) shows a snow covered area, and, as a result, the camera exposure
meter considers this white area being mid-gray if no compensation is applied. So, the snow covered area looks
grayish."

Exposure Compensation Tutorial
http://www.cs.mtu.edu/~shene/DigiCam/User-Guide/4500/EXPOSURE/EV-compensation.html

WB
White Balance

"White balance (WB) is the process of removing unrealistic color casts, so that objects which appear white in
person are rendered white in your photo. Proper camera white balance has to take into account the color
temperature of a light source, which refers to the relative warmth or coolness of white light. Our eyes are very
good at judging what is white under different light sources, however digital cameras often have great difficulty
with auto white balance (AWB). An incorrect WB can create unsightly blue, orange, or even green color
casts, which are unrealistic and particularly damaging to portraits. Performing WB in traditional film photography
requires attaching a different cast-removing filter for each lighting condition, whereas with digital this is no longer
required. Understanding digital white balance can help you avoid color casts created by your camera's AWB,
thereby improving your photos under a wider range of lighting conditions."

Cambridgeincolor.com White Balance Tutorial
http://www.cambridgeincolour.com/tutorials/white-balance.htm

Depth of Field

"Depth of field is the range of distance around the focal plane which is acceptably sharp. The depth of field varies depending on camera type, aperture and focusing distance, although print size and viewing distance can influence our perception of it. This section is designed to give a better intuitive and technical understanding for photography, and provides a depth of field calculator to show how it varies with your camera settings."

Cambridgeincolor.com Depth of Field Tutorial

http://www.cambridgeincolour.com/tutorials/depth-of-field.htm

Focal Length, 35M Equivalent Focal Length and Optical Zoom (X times zoom) and Digital Zoom

"Optical zoom = maximum focal length / minimum focal length
For instance, the optical zoom of a 28-280mm zoom lens is 280mm/28mm or 10X. This means that the size of a subject projected on the film or sensor surface will be ten times larger at maximum tele (280mm) than at maximum wide angle (28mm).
Optical zoom should not be confused with digital zoom." dpreviews.com learn, glossary, focal length

Understanding Camera Lenses

"Understanding camera lenses can help add more creative control to digital photography. Choosing the right lens for the task can become a complex trade-off between cost, size, weight, lens speed and image quality. This tutorial aims to improve understanding by providing an introductory overview of concepts relating to image quality, focal length, perspective, prime vs. zoom lenses and aperture or f-number."

LENS ELEMENTS and IMAGE QUALITY

"All but the simplest cameras contain lenses which are actually comprised of several lens elements. Each of these elements aims to direct the path of light rays such that they recreate the image as accurately as possible on the digital sensor. The goal is to minimize aberrations, while still utilizing the fewest and least expensive elements.

Optical aberrations occur when points of the image do not translate back onto single points after passing through the lens, causing image blurring, reduced contrast or misalignment of colors (chromatic aberration). Lenses may also suffer from uneven, radially decreasing image brightness (vignetting) or distortion."

Cambridgeincolor.com Understanding Camera Lenses Tutorial
http://www.cambridgeincolour.com/tutorials/camera-lenses.htm

Olympus – Download Manuals

http://www.olympus.co.jp/en/support/imsg/digicamera/download/manual/

Product Support - EVOLT E-500

http://www.olympusamerica.com/cpg_section/cpg_support_product.asp?id=1192

Olympus Digital School.com

Photo Lessons
http://www.olympusdigitalschool.com/Photo_Lessons/index.html