You accurately meter an exposure at ISO 200, f/5.6, for 1/500th of a second. You wish to bracket the exposure by adding one stop of light. What would be the new exposure values?

1. ISO 400, f/5.6, for 1/500th of a second
2. ISO 200, f/4.0, for 1/500th of a second
3. ISO 200, f/5.6, for 1/250th of a second

An aperture of f/8 allows twice as much light as f/16 to enter the camera.

false

Which ISO value is the most sensitive to light?

ISO 3200

Which value allows three more stops of light into the camera than provided by an ISO 100 setting?

ISO 800

Zoom lenses.....

allow the photographer to capture images at a variety of focal lengths

A shutter speed of 1/250th of a second allows twice as much light as 1/500th of a second to enter the camera.

true

What are the basic operating modes of the” typical” modern digital camera?

Program, Aperture Priority, Shutter (time) Priority, and Manual

Which filter is recommended for all camera lenses?

1A, Skylight, or UV

Which filter(s) is most commonly used to reduce glare when photographing evidence behind glass?

polarizer

Describe the relationship between DOF and f-stop?

When the f-stop is lower, the depth of field becomes shallower. Contrastingly, a higher f-stop will increase the depth of field.

Describe the relationship between DOF and Focal Length?

inversely proportional

To ensure crime scene photos are in proper focus, CSI investigators will try and use what f-stop settings?

an f-stop of 11 or higher will be closer to examination quality photographs

If you have to photograph thru a wire-fence structure, what can be done to “minimize” the appearance of the wire mesh?

The f-stop should be lowered so that the camera will avoid focusing on the fence and focus on the item behind it.

Why should you try to avoid using the highest f-stop lens setting (f/22)?

It is best to avoid using an f-stop like f/22 because the higher the settings, the more diffraction there is. If there is diffraction in the image, the photo can become grainy.

Why utilize "tent" when photographing evidence close-up?

The tent creates a controlled lighting setting that minimizes any glare. Overall, it will result in well-lit photographs.

What are the 3 stages of a clothing examination?

1st: observation of stains, deposits, and damage like patterns and tears

2nd: microscoping examination of stains, deposits, and comparing patterns

3rd: sampling of selected stains and deposits for further testing

Why is it important to take notes of brands, sizes, and fabric composition when cataloging clothing as evidence?

it allows for better documentation and identification of clothing evidence

What advantage is there to utilizing a "macro" lens when taking close-up photographs?

the macro lens allows for magnification and increases the exposure, and it allows for a better focus on short distances while capturing details.

Describe how a polarizing filter works.

A polarizing filter blocks light waves from reflected light in a certain direction. This filter will reduce the glare and reflection to only allow light from a specific orientation to pass through the lens.

Why should you use a polarizing filter?

-Reduce glare and reflections
-Enhance details and contrast in images
- Allow for visibility of evidence behind reflective surfaces

You only need to use a polarizing filter when photographing through glass.

False

Define the term “privilege direction” in relation to light.

It is the specific angle or direction of lighting that best reveals details, textures, or evidence on a surface.

In crime scene photography, when could you possibly have to photograph through glass?

When evidence is found inside a vehicle, building, or glass case/display. It can also be used for photographing damaged glass.