23/2/17 -Camera (Skills and Compression)

Tested along the way how well the camera knowledge has sunk in.

Schedule

Thursdays

23rd – Aperture

2nd – Colour

9th – Camera and edit setup

16th – Compression

23rd – Testing

Fridays – Showreel, Vimeo page or Website

 

Interlaced – T.V., live, documentary

Progressive – Filmic – Drop a field (25fps)

Upper field – DVCAM

Lower field – (small cam)

(De-Interlaced) – If the fields are the wrong way round, the video will be flickery.

LED – light emitting diode (10 years lifespan) – SOLID

LCD – Liquid crystal display (2-3 years lifespan) – LIQUID

PLASMA – GAS – Hardly ever used

C.R.T – Hardly ever used

 

P.A.L – Phase Alternating Line – Britain – TV Standard – 50Hz

N.T.S.C – North America – TV Standard – 60 Hz

S.E.C.A.M. – France – TV Standard – 50 Hz

70 dpi  (dots per inch)

1920 x 1080 – H.D. (frame size) (1080p)

4k – 4096 x 2160 (2160p)

Moving Image

Aperture, ISO, Shutter speed

Aperture – F setting – F Stop

  • Blurring the background of an image

Hole

(Pupil) like an eye is like the iris (aperture) on a camera

Diaphragm (affects the size of the aperture)

F – stop – Small aperture – Large number – f/22

Large aperture – Small number -f / 1.4

Inside – Open up aperture

If you are outside – Close the aperture

F8 and be there – If you aren’t sure of the lighting then use f8.

f/32 – D.O.F. – Depth of field – Focus near and far with a smaller aperture for example filming a pebble on a beach would be a high f setting to get the best focus. If you want it to blur, you change the aperture accordingly.

f/1.4 – Focus near not far or vice versa not both.

gugh

aperture

exposure-triangle-aperture1lowend-android-cameras-and-the-exposure-triangle-6-638

There can be different lenses:

Fixed (Prime) 1 x focal length – f stop remains the same

Zoom lens – Tighter and wider – Variable apertures

If you have a 18mm – 200mm zoom lens (zoom out) f/3.5  zoomed in is f/5.6

Some zoom lenses have no change in aperture like a fixed lens but most will.

Film

I.S.O. or A.S.A. – Sensitivity of what is recorded – Sensitivity of film to light

(International Standards Organisation)

Digital

Image Sensor

Lower number – lower sensitivity

High ISO is used in darker situations/locations e.g. to freeze each frame – sharpness

The recording becomes noisy e.g. recording sport. A darker situation so therefore you need to set a higher ISO but then you will have a noisier recording.

ISO 100 was the image on the left and ISO 3200 was the image on the right.

Below is ISO 200 – ISO 3200

ISO-200-and-ISO-3200.jpg

100-400 ASA is a small aperture so you could start off with an aperture of f/2.4 – f/8

  1. Light?
  2. Grain?
  3. Legs?
  4. Moving?

Indoor Sport – For indoor sport you would have a low ISO because you don’t want any grain. You would not use legs because it would constantly be moving. You would have a large aperture because it is filmed inside. – Limited light.

Concert – For concerts you would have a higher ISO because it would most likely be filmed indoors with no grain. You would use camera legs to get a still shot and have a large aperture because it would be fairly dark.

Museum of Art – This would be filmed with a high ISO with high grain and you would definitely use camera legs to get some still shots and have a high aperture.

Chinese New Year – This would be filmed with a low ISO because it would be filmed outside and you would have low grain. It would most likely be filmed on a stills camera and with legs with a low aperture.

SLR – Single lens reflex – Deflecting the light into the view finder.

Shutter Speed

Shut – Light sensor – Shut – Exposed

Length of time of exposure

Slower or faster

Fast shutter speed – Filming birds (1/250th of a second)

ISO needs to increase to 800 because of the sensitivity because we increased the shutter speed.

Iris – Aperture f/2.4

Lighting

Filming a car crash at night in front of the tower block – High shutter speed at about 1/400th and therefore the ISO would need to be increased to 800 because it would be filmed in the dark and the iris would have an aperture of f/2.4 with lots of lighting.

Camera Settings 

Aperture priority mode – I set the aperture and the camera will automatically set the shutter. ISO set.

For indoor sport you would set them to manual and control the aperture and shutter yourself.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s