Continuing with a discussion of terms, the ability to adjust shutter speed and aperture are probably the most important controls available on your camera. When using a film or digital camera you must control the amount of light that strikes the film or sensor. Too much and the image is “burned out” or overbright; too little and everything is black. There are many reasons for choosing a shutter speed or aperture yourself rather than letting the camera do it for you.
Aperture is the term for the size of the lens or lens opening. It can be used to describe the maximum opening of a lens, for example your camera may be described as having a f/2.8 lens. In most cases, at least for the same film or sensor size, the larger the diameter of the lens, the “faster” it is, that is the more light gets through it. A f/2.8 lens lets more light through it than a f/5.6, and will likely be more expensive. Actually, the physical diameter of the lens will also depend on its focal length, but let’s stick with aperture and save focal length for another posting.
Although a few inexpensive cameras may have a fixed aperture lens, most add an iris to change the working aperture of the lens the same way the iris in your eye adjusts for changing lighting conditions. Apertures are described by numbers called “f stops.” The term can be a bit confusing in that the smaller the number the larger the aperture and the more light strikes the sensor. Reducing the value by one stop lets 1/2 the amount of light through the lens as the previous number. Typical values include f/1, f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22, f/32, f/45, f/64, f/90, f/128 and so on, however most cameras only include a portion of the range. Note that doubling the number (for example from f 2.8 to f 5.6 diminishes the light by two stops or 1/4, not 1/2, as might be expected.
Click on “Read the rest of this entry” to find out how changing the aperture can improve your images.
Although changing the aperture of the lens is often used to increase or decrease the amount of light striking the sensor, it also can be used to select the portion of the image that is in focus.
The term depth of field describes how much of the image from the front of the lens to infinity will be in focus. A wide depth of field is created by stopping down the lens to a small opening (example – f/16.) Objects near the camera, the subject you focused on and the background will all be in focus.
Conversely, a narrow depth of field can be produced by shooting with the lens wide open (example f/2.8.) If you want to isolate your subject from the background, use a wide aperture and focus on the subject. The foreground & background will be blurred.
Neither a wide or narrow depth of field is “correct” – there are times you want everything in focus. An example might be an image of someone standing in front of a landmark or sign that you want to include in the image. Landscape photographers often use small apertures to keep everything in focus. On the other hand, it is often useful to isolate the subject from the background. If your subject is standing in front of a busy street or trees, they may blend and get lost in the background. By choosing a wide aperture to limit depth of field and careful focusing, your subject stands out. A sample of each is shown below. You can, if you wish, click on the image to link to a 700 pixel wide version located on my web site.
Wide Aperture, Narrow Depth of Field – f/2.8
Small Aperture, Wide Depth of Field – f/22
Another reason to use aperture priority is to force your camera to use a slow or fast shutter speed. Set the aperture to the smallest opening possible (for example, f/16) and your camera’s meter will choose a slow shutter speed – useful to blur water, streak headlights & taillights at night, etc. Choose a large opening (for example f/2.8) and your camera’s meter will choose a fast shutter speed – useful for limiting movement blur, freezing the spray from a wave, etc. Of course you could switch to shutter priority and set the shutter speed, but you may find the amount of light on the scene is outside the range of your lens. I’ll discuss using shutter priority in the next entry.
If your camera is set on full automatic or program mode, you have little control – it chooses the shutter speed & aperture for you. To gain control of depth of field you must set your camera to aperture priority. Not all cameras have this capability – check your manual or look for an “A” in a string of controls that include “P” “A” “S” “M”.
Pingback: furnace replacement
Pingback: adresas
Pingback: pvc double glazed windows
Pingback: make money fast
Pingback: Eugene Taxi
Pingback: Arizona Real Estate Attorney
Pingback: cialis
Pingback: Cheap Jordans
Pingback: Gelinlik Istanbul
Pingback: bailes en tubo
Pingback: articles directory
Pingback: Authentic jordans
Pingback: herbata
Pingback: herbata
Pingback: ogrzewanie
Pingback: how much is hydroseeding
Pingback: coupons
Pingback: ogrzewanie
Pingback: how do you apply for disability
Pingback: data recovery services
Pingback: diy basement waterproofing
Pingback: Legal advice
Pingback: water damage company
Pingback: sell screenplay for big money
Pingback: how to write a screen play
Pingback: screenwriting
Pingback: buy facebook poker chips
Pingback: Property Tax
Pingback: gasfiter
Pingback: sverige
Pingback: make money on the internet
Pingback: glee
Pingback: Treena Darsi
Pingback: alexa
Pingback: onebuckresume
Pingback: Social Media Marketing
Pingback: Social Networking Tips
Pingback: seo consultant
Pingback: Employment law
Pingback: delivered cake balls around austin
Pingback: Clicking Here
Pingback: Read This
Pingback: BioTRUST Low Carb
Pingback: airport taxi st. anton
Pingback: buy turnkey websites
Pingback: How to unlock a phone
Pingback: Pneumatic Tube Carriers
Pingback: Albuquerque SEO
Pingback: web design barrow
Pingback: easy recipes for parents
Pingback: yoga in bali
Pingback: Lowes Closet Organizers
Pingback: for more info click here
Pingback: physiotherapy in toronto
Pingback: Legal recruiter Chicago
Pingback: Studio
Pingback: abis projector
Pingback: Haraj
Pingback: projectorsite.co.uk
Pingback: trading options
Pingback: hosting
Pingback: hostgator coupons
Pingback: usual job interview questions
Pingback: employee benefits lincoln ne
Pingback: job interview weaknesses
Pingback: Recording Studio NYC
Pingback: lucid dreaming blog
Pingback: profesjonalne sprzatanie warszawa
Pingback: teen video
Pingback: warez
Pingback: bridal makeup
Pingback: Ross Barber Photography
Pingback: Ross Barber Photography
Pingback: Pittsburgh
Pingback: visit the website
Pingback: Letting Agents Chiswick
Pingback: infomarket.net.pl
Pingback: firmowykatalog.com.pl
Pingback: directbusiness.net.pl
Pingback: pozycjonowanie
Pingback: independence auto insurance
Pingback: pozycjonowanie
Pingback: ClickBank How To
Pingback: Candy Store
Pingback: www.domcen.pl
Pingback: www.uel.com.pl
Pingback: french classes
Pingback: biuro rachunkowe
Pingback: adult autism
Pingback: Joe Khorasani
Pingback: lacey washington taxi cab
Pingback: visalus scam
Pingback: hornby model trains
Pingback: share inspirational quotes
Pingback: baile del tubo
Pingback: homes for sale in Manhattan beach
Pingback: website internet marketing
Pingback: homes for sale in Redondo beach
Pingback: liposlim free trial
Pingback: Make money with Ebay
Pingback: sierra towers
Pingback: bigcommerce review
Pingback: sensa energy drink
Pingback: benjamin trevor grenier
Pingback: juegos de futbol 2013
Pingback: l.a.m.b. shoes.
Pingback: buy viagra online
Pingback: play online blackjack in Canada for real money
Pingback: enjoy online blackjack in Canada for more fun
Pingback: making easy money
Pingback: backpacks for school
Pingback: Leawood Computer Repair
Pingback: Liberty Computer Repair
Pingback: California Careers
Pingback: on this website
Pingback: Credit Blog
Pingback: Jackson
Pingback: water damage restoration companies
Pingback: temporary medical insurance
Pingback: Cris
Pingback: ebay global
Pingback: moving company Toronto
Pingback: gun accessories
Pingback: prezentacjefirm.pl
Pingback: Malinda Longtin
Pingback: nopal extract
Pingback: legal joseph c. peiffer
Pingback: rsg online course
Pingback: Last Will Template
Pingback: click here
Pingback: Russian college
Pingback: rsa training
Pingback: lead generation websites examples
Pingback: rsa certificate
Pingback: Turnkey Adult Website
Pingback: phlebotomy training classes
Pingback: gamo whisper review
Pingback: self publishing
Pingback: childrens
Pingback: hotels in llandudno
Pingback: cosmetic dentist salt lake city
Pingback: LawCrossing Review
Pingback: Chicago roof installation
Pingback: Learn More
Pingback: green coffie bean extract 800 mil
Pingback: cheap web hosting
Pingback: Koi
Pingback: common core math
Pingback: mlm
Pingback: Click here
Pingback: Medical term for heart attack
Pingback: Sample Mail Clerk
Pingback: Science Teacher Example
Pingback: money online
Pingback: learn more
Pingback: trick photography
Pingback: Hilda Schultz
Pingback: Clay Owens
Pingback: Unlock Swisscom iPhone 4
Pingback: Emma Paul
Pingback: ALLIANZ SECURITY PROTECTION
Pingback: Franklin Mills
Pingback: weight loss
Pingback: After Effects Intro templates
Pingback: Insurance Account Manager Resume Template
Pingback: ppi
Pingback: view website
Pingback: review on La splash of bistro bordeaux
Pingback: computer repair
Pingback: online pharamacy
Pingback: Read More
Pingback: prescription eyeglasses
Pingback: managed vps
Pingback: tatuaggi disegni maori lettere
Pingback: managed vps
Pingback: logos quiz
Pingback: risarcimento danni
Pingback: unlock iphone 4 untethered
Pingback: for freshers
Pingback: pengos
Pingback: privatlan med betalningsanmärkning
Pingback: factory unlock iphone 4
Pingback: how to unlock iphone 4
Pingback: smslana
Pingback: nya sms lan
Pingback: ??????? ?????
Pingback: ????? ????
Pingback: zdrowie
Pingback: Angel Patterson
Pingback: web hosting provider with the best technology
Pingback: resource
Pingback: web cam model jobs
Pingback: hiring models
Pingback: Real Estate Education
Pingback: Carpet Cleaning Cardiff
Pingback: communion cups
Pingback: best christian gifts
Pingback: Marijuana
Pingback: Nike Free
Pingback: post wedding reception invitations
Pingback: homes for sale in Sherman oaks
Pingback: zdrowie
Pingback: miracle miles homes for sale
Pingback: homes for sale in bel air
Pingback: homes for sale in Beverly hills post office
Pingback: learn more here
Pingback: michael fiore credentials
Pingback: company presentation
Pingback: click in this article
Pingback: New York Legal Recruiter
Pingback: marina del rey condos
Pingback: opzioni binarie guida
Pingback: black friday 2012 target
Pingback: shipping to andora
Pingback: serwis ogloszeniowy
Pingback: buildings insurance
Pingback: glucophage diabetes
Pingback: computer video games uk
Pingback: SEO
Pingback: web hosting
Pingback: $59.00 premium prescription eyewear Easy Ordering Free Shipping Free Returns
Pingback: Estate agent Derbyshire
Pingback: buildings insurance
Pingback: Dog Training
Pingback: tranny tube
Pingback: watch live tv online
Pingback: 500 free zeekler penny auction bids
Pingback: PPI claim form
Pingback: office furniture
Pingback: adopted
Pingback: Facebook messenger
Pingback: dwi lawyer hampton
Pingback: security guard incident report
Pingback: toronto waterproofing
Pingback: My
Pingback: online broker details
Pingback: Self Catering Accommodation Mauritius
Pingback: bikes
Pingback: massage in dubai
Pingback: Buy a condo in la
Pingback: san diego dui attorneys
Pingback: tummy tuck los angeles
Pingback: precle
Pingback: poleworx
Pingback: truth about abs
Pingback: Vintage Plus Size Clothing
Pingback: Kitchen Design
Pingback: search engine optimization
Pingback: Tv Online
Pingback: Window Fitters
Pingback: copier service
Pingback: Mobile Monopoly 2.0
Pingback: Electronic Cigarette Reviews
Pingback: click this
Pingback: further details
Pingback: agen pulsa
Pingback: benidorm discounts
Pingback: Ira Riklis
Pingback: Jogging
Pingback: Sonnenbrand
Pingback: private detective singapore
Pingback: private detective
Pingback: take a look at the site here
Pingback: get more info
Pingback: sporty and healthy
Pingback: Kitchens
Pingback: Moving the center
Pingback: pakaian dalam wanita
Pingback: Mold Inspection Companies
Pingback: check the website
Pingback: european pallet delivery
Pingback: Location Villa Ile Maurice
Pingback: custom challenge coins
Pingback: helpful hints
Pingback: seo blog
Pingback: appliance repair Los Angeles
Pingback: click here
Pingback: blueair
Pingback: best running books
Pingback: read more
Pingback: roofing contractors
Pingback: more information
Pingback: plain green loans
Pingback: Location Ile Maurice Flic en Flac
Pingback: click this
Pingback: lorry rental
Pingback: toy bouquet
Pingback: AHS.com Priority Code
Pingback: cortinas niteroi
Pingback: Hotels.com Discount Code
Pingback: web hosting in india
Pingback: back pain relief
Pingback: Roofers in Phoenix
Pingback: kasino
Pingback: Orlando attorney dui
Pingback: read this
Pingback: dotcomsecrets
Pingback: Singapore home loans
Pingback: UK Windows Virtual Server
Pingback: kratom
Pingback: locksmith in charlotte nc
Pingback: dog bandanas
Pingback: Ile Maurice Location Vacances
Pingback: www.prostatetest.net
Pingback: friendship bracelet design
Pingback: what is future and option trading
Pingback: dj mixing and mastering
Pingback: Candy
Pingback: Darren Chaker
Pingback: Get More Info
Pingback: Burton Pafundi
Pingback: how to make money blogging
Pingback: auto insurance austin tx
Pingback: truth about abs
Pingback: Best antivirus 2012
Pingback: Dreamlays reviews
Pingback: do approve me
Pingback: love pets
Pingback: lida kapsul
Pingback: website templates
Pingback: bad credit loans
Pingback: dg eyewear
Pingback: ????? ??? ???????
Pingback: cash for cars austin tx
Pingback: eat stop eat
Pingback: truth about abs
Pingback: small arms treaty nra
Pingback: melhor creatina
Pingback: uk seo
Pingback: free piano chords
Pingback: click here
Pingback: kick n bass fish attractant
Pingback: Share This Information
Pingback: Review
Pingback: espresso maker
Pingback: http://wildspirit.hu/hvwiki/index.php?title=10_Anyone_Did_not_Be_aware_of_Laser_Curly_hair_Removal
Pingback: commercial property insurance
Pingback: music mastering
Pingback: help me pay my bills
Pingback: Japan Times
Pingback: click here
Pingback: letmewatchthis
Pingback: portable projector screen
Pingback: klimatyzacja
Pingback: demoty
Pingback: drtv advertising
Pingback: seo perth
Pingback: push me
Pingback: dumpster rental fullerton ca
Pingback: dumpster rental shelton ct
Pingback: dumpster rental orem ut
Pingback: brake repair austin texas
Pingback: dumpster rental hoffman estates il
Pingback: this post
Pingback: justbeenpaid
Pingback: how to be a currency trader video
Pingback: knowledge management
Pingback: promotional products
Pingback: limo service toronto
Pingback: cazare arad
Pingback: Delta 19-900L
Pingback: Cleaning Companies San Diego
Pingback: Tucson Homes
Pingback: hootunes facebook
Pingback: Click Now Finance
Pingback: flexbelt
Pingback: iphone 4s jailbreak canada
Pingback: Ca acheve mon Homme
Pingback: Orange County Exterminator
Pingback: Huntington Beach Exterminator
Pingback: Dentists in Anchorage
Pingback: what is a toothache
Pingback: web design quebec
Pingback: Wedding Photography Cambridgeshire
Pingback: http://gokkenineenonlinecasino.com/
Pingback: Get More Details
Pingback: cheapest auto insurance quote
Pingback: UK Internet Documents
Pingback: the diet solution program hoax
Pingback: atlanta fencing
Pingback: Online Payday loans
Pingback: no win no fee
Pingback: mini displayport to hdmi
Pingback: fx
Pingback: motivated to lose weight
Pingback: Quickest way to melt stomach fat
Pingback: Fastest way to burn abdominal fat
Pingback: lotto guy
Pingback: ThaCaptin
Pingback: lip balm recipe
Pingback: shredding services austin
Pingback: Buy Online Tickets
Pingback: berkeley county gun dealers
Pingback: customised glass etching toronto
Pingback: Buy Facebook Fans
Pingback: symptoms of osteo arthritis
Pingback: Glasgow removal
Pingback: recover your data
Pingback: moving toronto
Pingback: lotto tips
Pingback: payday loans
Pingback: guitar lessons san diego
Pingback: google
Pingback: make your own website for kids
Pingback: free edu backlinks list
Pingback: casa en mallorca
Pingback: the tao of badass
Pingback: 1
Pingback: Proactol Plus
Pingback: vedeževanje
Pingback: toplotna crpalka
Pingback: Gold Coast Things To Do & See
Pingback: custom stone supply austin
Pingback: enjoy food
Pingback: Mauritius Accommodation
Pingback: truth about abs free
Pingback: Location Appartement Ile Maurice
Pingback: quiet title
Pingback: workout supplements
Pingback: Location Villa Ile Maurice Avec Piscine
Pingback: Ckeck mi out
Pingback: websites
Pingback: Taking Better Photographs, Part 4