Wednesday, November 19, 2008

Term 4 Session 5 "Rule of Thirds", Night Photography

(UPDATE Aug 2012 - I have removed images that won't display correctly but will leave the text here as reference)
Rule of thirds from term 3
We Talked about how to photograph small things ..

Wednesday, November 12, 2008

Term 4 Session 4 SLR's and Digicams, "F" numbers, Depth of field, Exposure Compensation

(UPDATE Aug 2012 - I have removed images that won't display correctly but will leave the text here as reference)
Much of my additional information comes
from the internet reference

site called "Wikipedia" which is at

If you like the resource you may think about donating towards the upkeep of this site.

Wikipedia (pronunciation Spoken content icon)is a free,[5]multilingual encyclopedia project supported
by the non-profit Wikimedia Foundation. Its name is a portmanteau of the words wiki
(a technology for creating collaborative websites) and encyclopedia.Wikipedia's
10 million articles have been written collaboratively by volunteers
around the world, and almost all of its articles can be edited by anyone who can access the Wikipedia website.[6]
Launched in 2001 by Jimmy Wales and Larry Sanger,[7]it is currently the largest and most popular[1] general reference work on the Internet.[8][9][10]

Parallax Error
Parallax is an apparent displacement or
difference of orientation of an object

viewed along two different lines of sight, and is measured by the angle
or semi-angle of

inclination between those two lines

Digital single-lens reflex camera.

single-lens reflex camera

digital SLR or DSLR) is a digital camera that uses

a mechanical mirror system and
pentaprism to direct light from the lens to an optical

viewfinder on the back of the camera.

Image:SLR cross section.svg

digital still camera
A digital camera
(or digicam for short) is a camera
that takes video or still

photographs, or both, digitally
by recording images via an electronic image sensor.

Front and back of a Canon PowerShot A95.

Many compact digital still
cameras can record sound and moving video
as well as still

photographs. In the Western market, digital
cameras outsell their 35 mm

In optics, the f-number

(sometimes called
, f-ratio, or relative aperture[1]) of an optical system expresses

the diameter of the
entrance pupil in terms of the focal length of the lens; in simpler terms,

the f-number is the focal length divided by the "effective"

It is a dimensionless
that is
a quantitative measure of
lens speed,

an important concept in
Image:Aperture diagram.svg

Depth of field
In optics, particularly as it relates

film and photography, the depth of field (DOF) is the portion of a scene
that appears sharp

in the image. Although a
lens can precisely focus at only one
distance, the decrease in

sharpness is gradual on either side of the focused distance, so that
within the DOF, the

unsharpness is imperceptible under normal viewing conditions.

.These pictures are also courtesy of Wikipedia
F22 = Very deep field

F2.8 Very shallow field

At f/32,
the background is distracting.

At f/5.6,
the flowers are isolated from the background.

Metering mode
In photography,

refers to
the way in which a
camera determines the exposure.

Exposure compensation

Exposure compensation

is a technique for adjusting the
exposure indicated by a photographic

, in
consideration of factors that may cause the indicated exposure to
result in

a less-than-optimal image. Factors considered may include unusual
lighting distribution,

variations within a camera system, filters, non-standard processing,

or intended
underexposure or overexposure. Cinematographers may also
apply exposure

compensation for changes in
or film speed, among other factors.

Wednesday, November 5, 2008

Term 4 Session 3: Factors When Buying a Digital Camera.

(UPDATE Aug 2012 - I have removed images that won't display correctly but will leave the text here as reference)

Remember when your looking at a digital camera it's a lot more than just the megapixels.
Major factors to look at are the lens, processor, software (firmware), build quality, brand reputation. For more factors check out this link to my reference site:
this has more links about this topic below the mind map.
Please report any links you may find, that don't work, to me so I can fix them.

This article seems worth reading........

Factors to Consider when Choosing a Digital SLR Camera <== follow this link for more.
"The newcomer to the world of Digital SLR cameras is presented with a bewildering array of options. It’s hard to keep track of exactly who is currently making DSLRs and how many models each have, but as of summer 2008 there were at least 9 manufacturers (Canon, Fuji, Leica, Nikon, Olympus, Panasonic, Pentax, Samsung and Sony) and between them there were something like 34 different models.
How do you choose which one to buy, and in what ways are they different? With so many different cameras available and new models being announced every few months it’s not really possible to make specific recommendations on which one is "best". The term "best" will depend on many factors unique to the user. However, I will attempt to outline the various factors that you might want to take into account when deciding which one to purchase."

Digital Zoom
This is the DP Review link about Digital Zoom really worth the look
It's clear from the picture that digital zoom is not helping at all.

It's no clearer ... just bigger and your computer can do that!
White Balance
"Most digital cameras also allow you to choose a white balance manually,
typically sunlight, cloudy, fluorescent, incandescent etc. Prosumer and
SLR digital cameras allow you to define your own white balance
reference. Before making the actual shot, you can focus at an area in
the scene which should be white or neutral gray, or at a white or gray
target card. The camera will then use this reference when making the
actual shot."

1.. 2..
1)The auto white balance was unable to find a white reference, resulting in dull and artificial colors.
2)The auto white balance got it right this time in a very similar scene
because it could use the clouds as its white reference.
A&R at Charlestown had this one that looked interesting.

This flex pod may not be quite the quality of a GorillaPod but was only $29 at Myers.
The original GorillaPod is at
and it only weighs 45 grams.

The original GorillaPod (below)available from NDF is at

and it only weighs 45 grams.

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