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George Schaub Posted: Jan 18, 2005 0 comments

There are times when you want your color to exactly match what's in the
scene, but for the most part color is a fairly subjective matter that can be
tweaked with ease in just about any image-editing program. Color has a hue--like
yellow, green or blue--as well as a vividness, which in photography is
often called its saturation. In addition, color can have a cast, which is influenced
by the prevailing lighting conditions when we make the photograph. That cast
can be influenced by the light source itself, such as photographing under direct
sun versus what we'd get when photographing under tungsten lights, and
by the position of the subject in relation to that light source, such as the
difference between photographing in the shade or open light. In addition, color
can also be influenced by the recording medium itself, be it film or digital,
and how the film is made or the digital image processor is programmed to change
the color during the recording processing.

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Filed under
George Schaub Posted: Mar 15, 2005 0 comments

Shutterbug Forums create an online community for information, questions and
debate on topics of interest to photographers today. A wide range of topics
are covered, including various camera User Groups, 35mm and Digital SLR photography,
camera collecting, Help desks and more. The Forums are also a great way to get
in touch with Shutterbug writers and editors as well as professional photographers
from around the world. Many of these experts will be moderating focused discussions,
as well as participating in all the Forums at the Shutterbug site.

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Filed under
George Schaub Posted: Sep 26, 2006 0 comments

One look at the specs of this new Tamron zoom and you'll understand why
it's immediately attractive to anyone carrying around a digital SLR in
their day bag. Weighing in at around 15 oz and measuring just under 3x3.2",
the lens is quite the marvel of size for what it delivers in focal length and
aperture options. Indeed, if someone told me that a constant aperture, 17mm
wide lens would be this size a few years back I'd have thought they had
lost their optical marbles. To be fair, however, that 17mm is not really a 17mm
in 35mm equivalent, thus practical terms, and I wonder why lenses like this
are still labeled that way. This lens is only for APS-C sensors, which means
it has the "35mm equivalent" of a 27mm wide angle view and 80mm
tele.


Tamron's new 17-50mm zoom, available in Canon, Nikon, Konica
Minolta (read Sony), and Pentax (read Samsung) mounts is highly
portable and compact.

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Filed under
George Schaub Posted: May 30, 2006 0 comments

In Brief

WD Passport Portable USB Drives

by George Schaub

It's clear that having a backup strategy when on the road can often make
the difference in image insurance. While downloading to your laptop to clear
your memory cards is now standard operating procedure, you should also consider
burni...

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George Schaub Posted: Dec 26, 2006 0 comments


All Photos © 2006, George Schaub, All Rights Reserved

Filed under
George Schaub Posted: Mar 15, 2005 0 comments

The pixels that make up a digital image each have an "address",
a code that defines color, brightness and shades. When we make images with a
digital camera or from film with a scanner we are creating a matrix of pixels
that altogether create the illusion of a continuous tone image. These codes
are not dyes or even densities, but specific information as to how the computer
will interpret the colors and tonal values on the screen. It is only when we
make a print that we leave the "digital" world and enter the world
of dyes and pigments. Because each pixel has a code, basically a bunch of information
that is composed of bits and bytes, we can alter that code to change the "address",
or color and tonal look of every pixel. In this lesson we'll use the Replace
Color dialog box, found in most versions of Photoshop, or under other names
in other programs, to illustrate the point and give you an easy, fun way to
play with your pictures.

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George Schaub Posted: Apr 25, 2006 0 comments


Open an image in Photoshop, then evoke the dialog box at Filters>Alien...

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George Schaub Posted: Oct 31, 2006 0 comments

First Look: Canon Digital Rebel XTi

by George Schaub

The Canon Digital Rebel line accomplished a number of things. It broke the
$1000 DSLR price barrier, with room to spare, and as a result brought DSLR photography
into the mainstream. What followed is history, with other makers bringing forth
their "bargain"...

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