Photography, Introduction to Speed and Movement – an article by Goff James

Here I am trying to learn how to take a decent photograph with my new camera. Progress is slow but I am enjoying it. Just have to take it step by step. Unfortunately I am rather good at forgetting things!

Shutter speed, also referred to as “exposure time”, represents;

the length of time a camera shutter is open to expose light into the camera sensor.

Slow Shutter speed creates an effect called “motion blur”, where moving objects appear blurred along the direction of the motion.

IMGP0189

Goff James, Movement, 2017

Slow shutter speeds are also used to photograph lightnings or other objects at night or in dim environments with a tripod.

Landscape photographers intentionally use slow shutter speeds to create a sense of motion on rivers and waterfalls, while keeping everything else in focus.

890a2d8f9982a516f7cb90f7cc4d64d9--monochrome-photography-white-photography

Marc AdamusEndless Falls (2007)
Mount Hood Wilderness, Oregon

http://www.marcadamus.com/photo/endless-falls/

Fast shutter speed is typically whatever it takes to freeze action.

Screen Shot 2017-09-22 at 16.14.43

Bob Martin, Title and Date Unstated.

http://www.bobmartin.com/gallery/test-gallery/

Aperture size affects the Depth of Field in an image and which area of the image will be sharp.

A large f-number such as f/32, (smaller aperture) brings all foreground and background objects in focus.

222_18

Paul White, Autumn Grindleford, Date Unstated

http://paulwhite.co.uk/personallandcape-photography/

A small f-number such as f/1.4 (large aperture) isolates the foreground from the background by making the foreground objects sharp and the background blurred and out of focus.

071aefd637c1ca40cd8ae2f988af366b--aaron-siskind-marthas-vineyard

Aaron Siskind, Martha’s Vineyard, 1954-59

http://www.theartstory.org/artist-siskind-aaron.htm

DSLR Camera Settings

The manual and semi-auto settings give one more creative control of a DSLR camera.

2017-09-21 08.55.26

A (Av) Aperture-priority /Autoexposure

The user selects the f-stop and the camera selects shutter speed that will produce a good exposure.

S (Sv) Shutter-priority / Autoexposure

The user sets the shutter speed and the camera selects the f-stop that will produce a good exposure.

M Manual Exposure

The user controls both the shutter speed and f-stop.

 

The common shutter speeds are:

1s  1/2s  1/4s  1/8s  1/15s  1/30s  1/60s  1/125s  1/250s  1/500s  1/1000s  1/2000s

Fast shutter speeds such as;

1/250s will freeze faster moving subjects, depending on their speed of movement.

Slow shutter speeds such as:

1/30s and slower will create motion blur with moving subjects, depending upon their speed of movement.

One has to remember that depending on the choice of lens  one should ideally select a shutter speed of at least 1/60s to prevent camera shake without using a tripod.

So much to remember! So Easily forgotten!!

Reference List

Andrew Johnson, 2017, Lesson Transcript

https://photographylife.com/what-is-shutter-speed-in-photography

Photography, Introduction to Exposure – an article by Goff James

Today I am attempting to try and understand the function of exposure in DSLR photography.

Being a newcomer to taking photographs with a DSLR camera to state that understanding the various terminology and options open to me for controlling the exposure of the image is rather overwhelming is no understatement.

Why is shooting with a DSLR so complicated? As I understand it’s down to something called film speed (ISO). ISO (Film Speed) can change. Helpful!

Consequently aperture, shutter speed, and ISO are three different settings that affect exposure.

Exposure Basics

Exposure on a D/SLR is controlled by using the correct combination of:

SHUTTER SPEED / (TIME VALUE) and,

APERTURE SETTINGS (APERTURE VALUE),as well as

FILM SPEED (ISO)

DSLR-Exposure

http://nofilmschool.com/2012/05/dslr-beginners-guide-exposure-diffraction

Shutter Speeds, Aperture settings and film speeds are able to creatively combined in many different ways to produce different creative effects.

(Andrew Johnson, 2017, DSLR Camera, An Introduction)

Exposure, the choice of aperture, shutter speed and ISO have a significant impact on the look and feel of ones images.

Exposure permits light to hit the camera sensor to record an image.

Remember to activate the camera meter by half-pressing the shutter release.

Aperture affects the depth of field, or how much of an image appears sharp.

Shutter Speed also affects image sharpness, with slower shutter speeds leading to blurred images

ISO enables one to use the optimum combination of aperture and shutter speed when the amount of light would normally prevent you from doing so.

Exposure_triangle_cheat_sheet-650-80

However, increasing the ISO also reduces the quality of ones images.

Understanding_exposure_cheat_sheet-650-80

http://www.techradar.com/how-to/photography-video-capture/cameras/the-exposure-triangle-aperture-shutter-speed-and-iso-explained-1320830

Reference List

https://digital-photography-school.com/aperture-priority-and-shutter-priority-exposure-lesson-1/

http://nofilmschool.com/2012/05/dslr-beginners-guide-exposure-diffraction

http://www.techradar.com/how-to/photography-video-capture/cameras/the-exposure-triangle-aperture-shutter-speed-and-iso-explained-1320830