Term
| What is Spectral Quality? |
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Definition
It is the "HUE" of light coming from it's source.
[image] |
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Term
| What Colour Wavelengths Does A Blue Sky Have A High Content Of? |
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Definition
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Term
| What Colour Wavelengths Do Tungsten Lamps Have A High Content Of? |
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Definition
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Term
| What is Colour Constancy? |
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Definition
| Our ability to see the colour of objects the same regardless of varying lighting conditions. |
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Term
| What is Colour Temperature? |
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Definition
Heat up a “black body” and it begins to
emit energy in the form of electromagnetic
wave.
The “black body” will begin to glow from a
red colour to a yellow then white and then
blue.
The colour temperature of a light source is
the temperature of a “black body” when it
emits energy at similar spectral distribution
as the light source. |
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Term
| What Are Examples of Colour Temperature? |
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Definition
Candle =1930 K
Tungsten light = 2700K-3400 K
Daylight = 5500 K
Electronic Flash = 6000 K
Cloudy sky = 6500 K
Blue Sky = 8000 K
[image] |
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Term
| When It Comes to Spectral Quality, What Are We Most Concerned About? |
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Definition
Colour Temperature
White Balance |
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Term
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Definition
per·spec·tive
pərˈspektiv/
noun
noun: perspective
-
1.
the art of drawing solid objects on a two-dimensional surface so as to give the right impression of their height, width, depth, and position in relation to each other when viewed from a particular point.
OR
The size of objects in relation
to each other
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Term
| What are the 3 Camera Viewpoints and Perspectives? |
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Definition
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Term
| Example of Flat Perspective |
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Definition
Long Focus or Telephoto Lenses will compress images and make them appear flat...no depth
Images are Spatially Compressed..no depth
[image] |
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Term
| Example of Normal Perspective |
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Definition
Images Shot Using a Normal (50mm approximately) Lens Will Appear as We Would See Them Looking at Them or As They Appear to the Human Eye...Normal Depth
[image] |
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Term
| Examples of Steep Perspective |
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Definition
When Images Have a Steep Perspective the Foreground is Disproportionately Large to The Background or Items in the Background...Not a Normal View
Images are Spatially Expanded...
[image] |
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Term
| What Causes the Change in Perspective? |
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Definition
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Term
| What is The "Plane of Focus"? |
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Definition
| The only part (or plane) of an image that is "truly in focus" |
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Term
| What is the Circle of Least Confusion? |
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Definition
The smallest
diameter of a point source image that a lens can
produce.
This value is the maximum diameter of the
image of a point source which will allow a
reasonably sharp 8x10 print to be made from
the image.
[image] |
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Term
| What Happens to Depth of Field When the F# is Doubled or is Shut Down @ Stops? |
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Definition
| The Depth of Field "Space" Also Doubles |
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Term
| How is Depth of Field Proportional to The Distance? |
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Definition
It is "squarely" proportional.
I.E. if you double the distance, depth of field quadruples.
2squared is 2x2 or 4
If you halve the distance, depth is quartered.
Square root of 16 is 4, 4 is 1/4 of 16 |
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Term
| Do Wide Angle Lenses Have More Depth of Field Than Telephoto Lenses? |
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Definition
Yes
A wider angle lens will have more depth of field than a telephoto lens for any given f# |
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Term
| What Are The 3 Ways to Control Depth of Field? |
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Definition
Aperture
Focal Length
Distance of Subject to Camera |
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Term
| How Does Aperture Control Depth of Field? |
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Definition
The smaller the aperture (larger number) the greater the depth of field. More in focus.
The larger the aperture (smaller number) the less depth of field. Less in focus. |
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Term
| How Does Your Focal Length Control Depth of Field? |
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Definition
The shorter your lens (smaller focal length i.e. 18mm, 24mm, 50mm,) has more depth of field.
The longer your lens (larger focal length i.e. 100mm, 300mm) has less depth of field.
This is only true if the camera distance has not changed!! |
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Term
| How Does Subject Distance From Camera Change Depth of Field? |
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Definition
The farther the subject is from the camera, the greater the depth of field.
The closer the subject is to the camera, the less depth of field there is. |
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Term
| What is "Hyperfocal Distance"? |
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Definition
When you focus your lens on infinity ∞
the nearest point that is also “acceptably
sharp” is the hyperfocal distance.
Focus at a particular point between the foreground and the background, which makes both the foreground and the background elements of the scene appear reasonably sharp. This focusing point is called the hyperfocal distance
Changes with your aperture. |
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Term
| Why Does Aperture Change Your Hyperfocal Distance? |
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Definition
Hyperfocal distance of your lens will vary with aperture. If your aperture is wide, such as f/2, you will need to focus quite far away for objects at infinity to appear in focus. However, at a small aperture of f/11 or f/16, distant objects will continue to be sharp even if your lens is focused more closely.
With smaller apertures, the hyperfocal distance will be closer to your lens.
[image] |
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Term
| How Do You Find the Hyperfocal Distance? |
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Definition
When you focus your lens on infinity ∞
the nearest point that is also “acceptably
sharp” is the hyperfocal distance
Focus on the hyperfocal
distance. This will result
with infinity falling just
within your depth field.
[image] |
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Term
| Why Should You Never Focus on Infinity? |
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Definition
| It is wasted depth of field as there is no beyond infinity. |
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Term
| What Happens if You Set Your Camera's Focus on the Hyperfocal Distance? |
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Definition
It will extend your depth of field from one half the Hyperfocal distance to infinity....
[image] |
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