Photography workshop: Intermediate

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Photography Workshop John Pheasant IAAP Tuesday 23 February 5 – 6 pm

Transcript of Photography workshop: Intermediate

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Photography  Workshop  John  Pheasant  IAAP  Tuesday  23  February  5  –  6  pm  

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Photography  workshop:  Intermediate  

¡ GeBng  to  know  you  

¡ Taking  control  of  your  photography  ¡ Aperture  and  depth  of  field  ¡ ShuHer  speed  and  sense  of  moIon  

¡ PracIcal  

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GeBng  to  know  you  

¡ How  long  have  you  been  taking  photos?  

¡ What  do  you  like  to  photograph?  

¡ What  camera  do  you  have?  

¡ What  would  you  like  to  learn  in  this  workshop?  

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Taking  control  

¡ Point  and  shoot  cameras  ¡ You  point  but  the  camera  does  the  interesIng  part  

¡ SLR  and  DSLR  cameras  let  you  take  control  ¡ Let’s  look  at  two  essenIal  ways  of  taking  control  

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Photography  basics:  revision  

¡ What  controls  your  exposure?  

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Photography  basics:  revision  

¡ What  controls  your  exposure?  

 ¡ Aperture  

¡ ShuHer  speed  

¡ SensiIvity  of  the  sensor  or  film  

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Photography  basics:  revision  ¡ What  controls  your  exposure?  

 ¡ Aperture:  the  size  of  the  hole  through  which  light  enters  the  camera  

¡ ShuHer  speed:  the  length  of  Ime  during  which  light  enters  the  camera  

¡ SensiIvity  of  the  sensor  or  film:  the  amount  of  light  needed  to  record  the  image  

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Photography  basics:  revision    

¡ Aperture:  e.g.  f/2.8  

¡ ShuHer  speed:  e.g.  1/500  sec    ¡ SensiIvity  of  the  sensor  or  film:  e.g.  ISO  100  

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Photography  basics:  revision  ¡ There  is  a  mathemaIcal  relaIonship  between  

¡ Aperture  

¡ ShuHer  speed  

¡ SensiIvity  of  the  sensor  or  film  (ISO)  

¡ At  the  same  ISO,  halving  the  aperture  requires  the  Ime  the  shuHer  is  open  to  be  doubled  to  make  the  same  exposure  

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Aperture  and  shuHer  speed  ¡ Apertures  

¡ Smallest  to  largest  (called  ‘stops’)  ¡  f/32,  f/22,  f/16,  f/11,  f/8,  f/5.6,  f/4,  f/2.8  

¡ ShuHer  speeds  ¡ Fastest  to  slowest  ¡ 1/1000  sec,  1/500  sec,  1/250  sec,  1/125  sec,    1/60  sec,  1/30  sec,  1/15  sec,  1/8  sec  

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Aperture  and  shuHer  speed  ¡ The  same  exposure  can  be  made  with  different  combinaIons  of  aperture,  shuHer  speed  and  ISO,  e.g.    ¡ Aperture:  f/2.8  ¡ ShuHer  speed:  1/500  sec  ¡ SensiIvity  of  the  sensor  or  film:  ISO  100  

¡ Will  give  the  same  exposure  as  ¡ Aperture:  f/4  (aperture  halved)  ¡ ShuHer  speed:  1/250  sec  (Ime  shuHer  is  open  doubled)  ¡ SensiIvity  of  the  sensor  or  film:  ISO  100  

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Aperture  and  depth  of  field  

¡ Aperture  ¡ also  controls  depth  of  field  (how  much  of  the  photo  is  in  focus)  

 ¡ The  smaller  the  hole,  the  greater  the  dof  ¡ The  larger  the  hole,  the  shallower  the  dof    

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                                                                                                     Aperture    ¡ The  larger  the  hole,  the  smaller  the  aperture  number  

 e.g.  f/2.8,  f/5.6    (  =  faster  shuHer  speeds)  

 

¡ The  smaller  the  hole,  bigger  the  aperture  number  

 e.g.  f/11,  f/16  (  =  slower  shuHer  speeds)  

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Depth  of  field    ¡ Everything  in  focus?    ¡ Specific  subject  in  focus?  

¡ How  much  depth  of  field?  

¡ Depth  of  field  and  low  light  photography  

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 Depth  of  field:  shallow  

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 Depth  of  field:  less  shallow  

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Depth  of  field:  portraits  

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Depth  of  field:  portraits  

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 Depth  of  field:  low  light  ¡  Greater  depth  of  field  =  smaller  apertures  (e.g.  f/11,  f/16)  

¡  Smaller  apertures  require  the  shuHer  to  be  open  for  longer  

¡  Slower  shuHer  speed  increases  risk  of  hand  shake  (blurring)  

¡  SoluIon?  

¡  Increase  ISO  

¡  Tip:  use  auto  ISO  and  set  minimum  shuHer  speed  

¡  Allows  photographer  to  vary  aperture  (dof)  without  blur  

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 Depth  of  field:  low  light  ¡ But!  

¡ Higher  ISO  (e.g.  800,  1600)  =  ‘noise’  

¡ ‘Noise’  is  a  grainy  effect  in  the  image  

¡ Tip:  use  lowest  ISO  as  possible  (e.g  400  rather  than  800)  

¡ With  higher  ISO:  reduce  noise  in  ediIng  

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ShuHer  speed  ¡ The  faster  the  shuHer  speed,  the  sharper  the  image  (less  hand  shake  or  blur)  

¡ But,  if  you  slow  the  shuHer  speed,  you  can  create  a  sense  of  moIon  

¡ For  long  exposures  (1/20  sec  and  slower),  use  a  tripod  

¡ Panning  

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ShuHer  speed:  moIon  

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ShuHer  speed:  moIon  ¡ This  photo  was  taken  at  1/60  sec    

¡ At  this  shuHer  speed,  the  red  spokes  of  the  wheel  are  slightly  blurred  

¡ This  conveys  the  moIon  

¡ The  focus  is  on  the  inner  mechanism  pulping  the  sugar  cane  

¡ Aperture  f/5    

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ShuHer  speed:  water  ¡ Long  exposures  (very  slow  shuHer  speeds)  will  smooth  water  and  give  a  dreamy  effect  

 

 

 

 

 

 

Copyright  500px  

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ShuHer  speed:  waterfalls  ¡ Long  exposures  (slow  shuHer  speeds)  create  a  sense  of  flowing  water  in  rivers  and  waterfalls  

Copyright    deviantart  

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Select  aperture  or  shuHer  speed  ¡ Never  use  auto  

¡ Select  aperture  seBng:  you  control  aperture,  the  camera  sets  your  shuHer  speed  

¡ I  recommend  this  seBng  for  most  photography  

¡ For  moIon,  select  shuHer  speed:  you  control  shuHer  speed,  the  camera  sets  you  aperture  

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PracIcal  

¡ Let’s  get  you  taking  some  photos!  

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