Final Exam Questions - Whitney

I wasn't sure what we were supposed to do with this, but these are my completed final exam questions that you posted.

Whitney Russell

1. What is the difference between a reflex camera FX or DX?

The main advantages of DX sensors are compact wide-range zooms, more "reach" with telephoto lenses, and greater working distance for close-up / macro shots. The advantages of FX sensors include high ISO image quality, and very good results with most older lenses (designed prior to DX), and exceptionally high image quality with fast primes. There are some exceptions which do not work well on FX, just as there are lenses which don't work well on DX.

2. How can you calculate the length of the normal focal length in a digital or film camera?

A zoom lens is a lens that can change focal length. Most modern consumer digital cameras have zoom lenses. Some inexpensive cameras have a fixed focal length lens and most high-end professional cameras have interchangeable lenses (either zoom lenses or fixed focal length lenses).

3. What does normal focal length mean?

The focal length number tells us how much of the scene is captured in the picture. The lower the number, the more we can see. A wide angle setting (zoomed out), where you can see a lot of the scene, has a small number or shorter focal length. A narrow angle setting (zoomed in), where you can see only a small part of the scene, has a large number or longer focal length.

4. Which is the normal focal length in a DX camera or in an FX camera?

On a 35mm film camera a normal focal length is 50mm, a wide angle is less than 50mm, and a narrow angle (often called telephoto) is larger than 50mm.

5. What is a wide angle lens?

 A camera lens having a wider than normal angle of view (and usually a short focal length); produces an image that is foreshortened in the center and increasingly distorted in the periphery and angle of view wider than 60°

6. What is a telephoto lens?

 A lens with a longer focal length than standard, giving a narrow field of view and a magnified image.

7. What is a zoom lens?

A lens allowing a camera to change smoothly from a long shot to a close-up or vice versa by varying the focal length.

8. Is your lens on your camera a prime lens or zoom lens?

Zoom lens

9. Which is the maximum aperture available on your lens in the wide angle setting?

f/4

10. Which is the maximum aperture available on your lens in the telephoto setting?

f/5.6

11. Which are the "best" aperture to exploit the maximum quality of the lens?

Somewhere in the middle of your aperture range you are most likely to find the 'optimum' aperture, the point where the image is clearest and sharpest from one edge to the other
typically f/8 to f/11 

12. What is the diaphragm that allows the most shallow depth of field?

f/2.8 or f/1.4 or f/4 

13. What is the diaphragm that allows the deepest depth of field?

F/22

14. What are the kelvin degrees?

The kelvin is often used in the measure of the colour temperature of light sources. Colour temperature is based upon the principle that a black body radiator emits light of which the colour depends on the temperature of the radiator. Black bodies with temperatures below about 4000 K appear reddish whereas those above about 7500 K appear bluish. Colour temperature is important in the fields of image projection and photography where a colour temperature of approximately 5600 K is required to match "daylight" film emulsions.

15. How can you calculate the exposure of a subject with or without the light meter?

With the light meter, point the meter at the scene and set the aperture and shutter speed as indicated. -Without the light meter, on a middle tone subject on a bright sunny day; Exposure=100/ISO at f/16. -Aperature can be set based on these rules:

Bright sunny day - f 16

Heavy overcast - f 8

Sunset/thick shade - f 4

Brightly lit indoors with some window light - f 2 (e.g. on the bus)

Brightly lit indoors, no windows (or nighttime) - f 1

16. How can you calculate the exposure of a subject with a strong light behind him?

Set the ISO and aperture to obtain the desired picture and the correlating shutter speed should give a direct relationship to the Exposure Value

17. What is the difference between RAW, JPEG, or TIF file?

A RAW image is the pure data directly saved from the camera's image sensor onto the card. With other image formats the camera processes the raw data and converts it to TIFF or JPEG, but with RAW mode the pure data is saved and can be edited later.

     JPEG is a standardized image-compression format. JPEG compression reduces the file size but has no effect on the number of pixels in the image (i.e., the resolution). A TIFF image is an uncompressed image showing the full detail of the image with no quality loss. TIFF images are very large and can take large amounts of storage space and can take a long time to save to the memory card.

18. Does your camera a RAW setting?

Yes

19. What is the ISO sensitivity that you set on your camera in a low light?

1600-3200

20. What is the ISO you set on your camera in a really bright light?

100 or less