Certified Professional Photographer

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Flashcards designed to help study for the Certified Professional Photographer exam. Courtesy of Heather Smith | Smith Photography & Design | www.smithphotodesign.com

What is a BIT?

The smallest unit of information consisting of either a 1 or a zero. It can only represent two possibilities - either yes or no, black or white.

What is a color profile?

A mathematical translator assigned to each piece of equipment you use (they map one gamut to another; and the ICC (or International Color Consortium) profile is usually shipped by the equipment manufacturer).

What does "photomacrograph" or "macrophotograph" mean?

Close-ups that are life-size or larger. Images through microscopes are "photomicrographs."

What is gamut?

The entire range of colors that can be seen, reproduced, or captured. Our eyes have a greater gamut than a print or monitor.

What are the effects of top lighting?

Creates deep shadows in eye pockets, under nose, and chin.

What are the effects of high side lighting?

With the Main at 45 degrees to one side and 45 degrees above subject, it is a classic angle for portraits. It seems natural and flattering and models the face into 3D form.

How can you change the brightness of the background when using flash?

Change the shutter speed. The longer the shutter speed, the lighter the background will be. The faster the shutter speed, the darker the background will be because less existing light is captured.

What is interpolated resolution?

On a scanner; it guesses what the pixels look like in between the ones the scanner can actually measure.

Digital cameras use what set of primary colors?

Additive (R, G, B)

What do the bars on the left of a histogram represent?

Black (0)

What do the bars on the right of a histogram represent?

White (255)

The area of acceptable sharpness in an image is called what?

Depth of field

What is a derivative file?

A RAW file that has been altered

What kind of lighting pattern is useful to widen a subject?

Broad lighting

What kind of lighting patter is useful to narrow a face?

Short lighting

As the aperture is stopped down, what happens to sharpness?

More of the background and foreground are sharp.

Why is depth of field greater on a short lens versus a long lens?

Relative aperture. The opening on a long lens must be larger than a corresponding opening on a short lens to produce the same f-stops.

What is focal length, technically?

The distance between the lens rear nodal point and the focal plane when the lens is focused at infinity.

Focal length controls what?

1) Magnification, or the size of the subject; 2) Angle of view

A normal (or standard) focal length lens approximates what?

The impression human vision gives

What determines what will be a 'normal' focal length lens on a particular camera?

Sensor size - the larger the sensor size, the longer the focal length of a normal lens. (Corresponds to a diagonal line across the frame)

What does side lighting emphasize?

emphasizes textures

To minimize facial wrinkles, this type of lighting is best

Front lighting

What are IPTC fields used for?

Metadata fields that hold info on photographer, subject, and use.

An in-camera reflected meter reading a very light toned scene indicates an exposure of 1/250th at f/8. For a correct exposure, what should you do?

Use positive exposure compensation (overexposure). A reflected meter reading will attempt to make the scene 18% gray - employ overexposure to adjust.

An incident-exposure reading for a fair-skinned subject reads f/8, 1/125th at 100 ISO. The next subject is very dark skinned. What is the proper exposure for the second subject?

No change. The EXPOSURE doesn't change or it would also change the background as well. Move the lights to adjust.

What is the general rule of thumb for the measurement of a 'normal' lens?

The diagonal measurement of the sensor.

What kind of light will be produced when using a large white umbrella close to a subject?

flat, low contrast light

This technique allows you to keep a subject that is moving toward you well focused

Follow focus

How does 'unsharp mask' work?

It emphasizes the edges between tones. A threshold of zero affects all pixels - a higher threshold affects just the edges with high tonal difference and minimizes noise.

What is the CCD or CMOS sensor?

The sensor that converts the image from analog to digital (1's and 0's) CCD=charge coupled device; CMOS=complementary metal-oxide semiconductor

What does a neutral density filter do?

Absorbs equal quantities of all wavelengths of light. It allows you to use wider apertures or slower shutter speeds without changing color balance.

What is the effect of front lighting?

Flattens out the volume of the subject and minimizes textures

What kind of film can help reduce haze in a landscape?

Infrared

Going clockwise around the color wheel, starting with RED, what is the progression of colors?

Red, Yellow, Green, Cyan, Blue, Magenta

Generally, traditional portraits use what lighting ratio?

3:1 or 4:1

An SLR camera uses what to allow you to see exactly what you'll photograph?

A mirror and pentaprism

What is a flag?

Also called a gobo; it is a small panel usually mounted on a stand that shades some part of the subject or shields the lens from light that could cause flare

A filter with a factor of 2 requires how many stops of compensation?

factor of 2 = 1 stop compensation. (Each time a factor doubles, it's one additional stop)

What angle of view does a reflected light meter read?

Similar to a normal lens at about 30 degrees

What angle of view does a spot meter read?

Maybe as little as 0.5 degrees or 1 degree

What angle of view does an incident meter read?

Very wide at about 180 degrees

What is the name of the issue that prevents you from seeing exactly what the lens sees when using a rangefinder camera?

Parallax

What is the optical resolution on a scanner defined as?

The pixels per inch a scanner is capable of capturing often described as two numbers (i.e. 1200x2400)

Name 2 ways you can decrease depth of field

1) Use a longer lens; 2) Move closer to the subject

A lens set at f/4 admits how much more/less light than one set at f/2.8?

Half as much light

When buying a lens hood, you should get it in what size relative to the lens?

It should match the focal length. Too wide and it's inefficient; too narrow and it will vignette; most likely to occur with wide angle of 28mm and below.

A color image with smooth gradiations requires at least what bit depth?

24 bits per pixel (8 per color), which gives 16,777,216 colors

When the size of the aperture is decreased, it is said to be what?

stopped down

A general purpose lens will provide an f-stop range of up to how many?

8 stops

Panning does what?

Keeps a moving subject sharp while blurring the background

What is an element and where is it found?

A simple lens with two curved sides or one curved and one flat side; found in a compound lens.

What two controls adjust the amount of light that reaches the sensor?

Aperture and shutter

What do TTL systems react to?

The amount of light reflected back from the subject during exposure.

Convex lenses cause light rays to do what?

bend toward each other and converge at the focal point.

In short lighting, where is the main light placed?

To strike the side of the face away from the camera.

Why does a short lens create wide-angle distortion

Because you can move in close to the subject

What does ISO stand for?

International Organization for Standardization

Aperture controls what?

The brightness of the light that reaches the sensor

What is the suggested shutter speed to stop action of a child running parallel to the film plan, about 25 feet from the camera?

1/250th

Perspective is affected by what?

lens-to-subject distance

What is a BYTE?

An 8-BIT sequence that represents 256 possibilities - black & white & 254 shades of grey. The size of a file is the number of bytes it contains.

Most modern lenses are based on this kind of lens

Convex

Sharpness from near to far is controlled by what?

Aperture

The quantity of light that reaches your sensor is controlled by what?

Shutter speed & aperture

The term to describe the combination of aperture and shutter speed that can be changed by moving them in opposite directions

Reciprocal relationship

Most lenses are sharpest closed down to how many stops from the widest?

1 or 2

Name two ways you can increase depth of field (other than changing aperture)

1) Use a shorter focal length; 2) Move farther away from the subject

In a curves adjustment layer, what does the shape of the curve indicate?

Contrast

When the additive primaries are mixed together equally, what is created?

White (additive primaries are Red, Green Blue)

An in-camera reflected meter reading a very dark scene indicates an exposure of 1/250th at f/8. For a correct exposure, what should you do?

Use negative exposure compensation (underexpose). The meter will attempt to make the dark scene 18% grey, underexpose to bring it back to dark.

When the subtractive primaries are added together equally, what is created?

Black. Subtractive primaries are Magenta, Yellow, Cyan

What is the inverse square law?

The intensity of the illumination is inversely proportional to the square of the distance from light to subject. At twice the distance from the subject, the light illuminates only 1/4 of the original.

What is TTL?

Through the Lens. A camera that can automatically control flash exposure using sensors inside the camera.

If you must move to reduce the amount of flash reaching your subject, how far do you move?

To create a 1-stop difference, multiply the original distance by 1.4. Example - if you were originally 5 feet away, a 1-stop difference would have you step back to 7 feet.

What kind of lighting pattern is best for average oval faces and round faces you want to slim?

Short lighting.

How much resolution do you need for: Internet? Newspaper? Photographic print? Glossy magazine?

Internet = 72 dpi; Newspaper = 150 dpi; Photographic print = 240-300 dpi; Gloss magazine = 400 dpi

The useable exposure range of a sensor, or the range of subject brightness is called what?

dynamic range (not to be confused with gamut)

An 8x10 at 240 dpi will have a resolution of what?

1920 pixels by 2400 pixels (4.6 million pixels)

To emphasize texture in a portrait, what kind of light source is recommended?

Small light source at an angle to the subject

When doing close-up work, what happens to the depth of field when the subject is closer to the lens?

It decreases. A 50mm lens at 12 inches and f/4 has a DOF of 1/16th of an inch. At f/11, it increases to only 1/2 an inch.

What would you use an ICC profile for?

To send accurate color requirements to a printer.

When mixed in varying proportion, the subtractive primary colors produce what?

All colors

How is brightness and contrast best controlled in Photoshop?

Levels adjustment

A 1:1 lighting ratio produces what lighting result?

Flat lighting

Generally, how much exposure compensation (in stops) should be used when using a polarizing filter?

1 1/3 stops

How would you define exposure in mathematical terms? (X times Y = exposure)

Intensity (aperture) x Time (shutter)

Name 3 ways to make a tonal adjustment in Photoshop

Curves adjustment; Levels adjustment; Brighteness/Contrast adjustment

What is burning?

Selectively increasing print exposure, which will make select parts of the image darker

What is dodging?

Selectively blocking light during print exposure to lighten the area

All objects beyond the closest distance in focus will be sharp when this appears within the DOF scale

Infinity

What is the best color profile for web images?

sRGB

What angle should a polarizing filter be to the sun for best results?

90 degrees. If using to eliminate reflections, it should be used at 35 degrees.

What does the term "stop" mean?

A change in illumination

The amount of motion blur in an image will increase if you do what?

lengthen (or slow) the shutter speed

What are the three main factors that affect depth of field?

Aperture, focal length, and distance to the subject

In the 20th century, black & white photographers used the Zone system to tame excessive contrast. Now, digital photographers use what?

High Dynamic Range

A ring of thin, overlapping leaves located inside the lens is called what?

The diaphragm - the mechanism that controls aperture.

Printers use what set of colors?

Subtractive primaries (plus black)

An image made of pixels is sometimes called what?

A raster image

What are quad- and hex- tone printing?

Inkjet black & white printing where color cartridges are replaced with shades of gray, resulting in smooth tones and slight color cast

What is a thyristor?

A light-sensitive cell or sensor inside a flash unit that measures the amount of light reflecting off a subject when a flash is used.

The relative aperture is equal to the lens focal length divided by what?

aperture diameter

What are luminance and illuminance?

Luminance is light reflected from the subject (measured by a reflected-light meter), while Illuminance is light falling on a subject (as measured with an incident light meter)

Contrast measures what in a print?

The difference between light and dark.

What light source has the highest color temperature?

Direct sun at 11,000 Kelvin

Daylight is approximately what color temperature?

5,000 Kelvin

Tungsten is approximately what color temperature?

3200 Kelvin

Stopping a lens down from f/8 to f/16 represents a X stop difference

Two (f/8 > f/11 > f/16)

A lens with a very wide angle of view and produces barrel distortion is what kind of lens?

Fisheye

This kind of meter is preferred by photographers working in a studio situation where lighting conditions can be altered

Incident light meter

8 bits per pixel gives you how many colors?

256

This viewing option gives you the most accurate version of your image in Photoshop

Actual Pixel view

Copyright law has certain built-in exceptions that allow for special situations in using copyrighted material. They are called what?

Fair Use

In a 2:1 ratio, the shadow side of the subject would meter at X stop(s) less than the highlight side

One stop less

According to the Inverse Square Law, at a distance of 10 feet from a flash, the area illuminated receives how much more/less light than the area illuminated at 20 feet from the flash?

four times more

What kind of lighting pattern places the key light directly in front of and higher than the face?

Butterfly lighting

What Photoshop tool allows you to select an area of any size or shape by drawing freehand?

Lasso tool

when adjusting an image with levels, if you want to make any color neutral quickly, what would you do?

Click with the neutral-point dropper on the selected color

The smallest unit of digital information is called a what?

Bit

A histogram shows what in an image?

The brightness of all the pixels in an image

Resolution refers to what?

The number of pixels per unit of length in a image

Bit depth refers to what?

The amount of information contained in each pixel

Color systems divide all colors into which three measurements?

Hue, Luminance, Saturation

Cyan is composed of equal parts of what two colors?

Blue & Green

This stores electronic images captured in a digital camera until they can be transferred to a computer

Memory card / flash card / compact flash card

Using this kind of automatic exposure setting on the camera, you set the aperture and the camera sets the shutter speed

Aperture-Priority

Using this kind of automatic exposure setting on the camera, you set the shutter speed and the camera sets the aperture

Shutter-Priority

Doubling the aperture setting creates how many stops difference in the amount of light reaching the sensor?

One stop

As the aperture becomes smaller, what happens to the depth of field?

It increases

What is the term used to describe a sensor's sensitivity to light?

ISO

What is the usable exposure range, or range of subject brightness called?

Dynamic range

The term "ISO speed" is used to describe what?

The sensor's sensitivity to light

A technique used to maintain sharp focus on a subject that is moving toward you is called what?

Follow focus

This kind of lens has a variable focal length

Zoom lens

What kind of meter is built in to most cameras?

Reflected light meter

This type of file format compresses images by discarding pixels; therefore, each time an images is compressed, it loses pixels

JPEG

In a digital image, the images file sizes corresponds to the total number of what in the image?

Total number of pixels

Can you save layers in a JPEG file format?

No

Printers use how many bits per channel of information when printing?

8 bits

This type of backup system is fault-tolerant because it creates redundant data

RAID system

This light modifier can be used to highlight a specific area of the subject

Snoot

According to the rule of thirds, where should the important parts of an image fall?

Along the lines of an imaginary grid at intersecting points that divide the image into thirds horizontally and vertically

The rule of thirds necessitates that the composition be divided into a grid of now many equal rectangles or squares?

9

What is the term used to describe data contained in a digital image?

Metadata

What is the term used to describe human's change in perception of a color under different light sources?

Metamerism

If your print will be viewed mostly under window light, what is the suggested Kelvin temperature of the lights you should use to evaluate your print?

5000K

What is the name of the technique used to make a monitor look like what you will see on your print?

Soft proofing

The greatest tonal range from black to white is achievable on what kind of paper?

Glossy paper

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