Hhpc macro workshop

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Hhpc macro workshop

  1. 1. HHPCMacro & Close-up Workshop 2/2/13 Ed Knepley
  2. 2. Macro & Close-up Devices (and where they go)1. Lens – macro & regular2. Between Camera & Lens – Teleconverter – Extension Tubes3. In Front of Lens – Screw-in Close-up Lens
  3. 3. Less Frequently Used Reversing Ring Bellows
  4. 4. Focusing Rail For Precise Focus (& Maximum Magnification) Focusing Rail is used to Precisely position the camera in terms of Distance from the SubjectMaximum magnification (reproduction ratio) REQUIRES the Lens to be at its MINIMUM FOCUS DISTANCE Technique1. Focus lens to minimum focus distance2. Bring the subject in focus by –  Moving the camera  Until subject is in focus
  5. 5. Focusing Rail For Precise Focus (& Maximum Magnification) Focusing Rail is used to Precisely position the camera in terms of Distance from the SubjectMaximum magnification (reproduction ratio) REQUIRES the Lens to be at its MINIMUM FOCUS DISTANCE Technique1. Focus lens to minimum focus distance2. Bring the subject in focus by –  Moving the camera  Until subject is in focus
  6. 6. Focusing Rail For Precise Focus (& Maximum Magnification) Focusing Rail is used to Precisely position the camera in terms of Distance from the SubjectMaximum magnification (reproduction ratio) REQUIRES the Lens to be at its MINIMUM FOCUS DISTANCE Maximum Magnification Technique1. Set lens focus distance to minimum2. Bring the subject in focus by –  Moving the camera  Until subject is in focus
  7. 7. Hands On Time Minimum Focus DistanceDistance at which Magnification is Greatest Maximum is infinity for the two at left Less than 4 feet for the one above
  8. 8. Effect of Various Macro Accessories On Image Magnification All images are maximum possible magnification75-300 @ 300 75-300 @ 300 As on left + 1.4 X T-C + Close-up Lens
  9. 9. Effect of Various Macro Accessories On Image Magnification All images are maximum possible magnification for devices usedNOTE –• 1:1 means Life-sized • Life-sized means 1” long subject will fit exactly on a 1” long sensor, for example • At its maximum magnification (Substitute 5” for a 4x5 view camera, for example) 1:1 & 1:1 Macro 1:1 + T-C 1:1 + 36 mm tube 12 + 20 + 36 tubes Example of Life-sizedSensor is 1”x2/3”Stamp is 1” high
  10. 10. Can stack accessories until the lens mount pulls loose from the camera. Note – these 2 have almost the same magnification • Macro lens is not essential 75-300 @ 300 75-300 @ 300 As on left + 1.4 X T-C + Close-up Lens 1:1 & 1:1 Macro 1:1 + T-C 1:1 + 36 mm tube 12 + 20 + 36 tubesSensor is 1”x2/3”Stamp is 1” high Example of Life-sized
  11. 11. Basic Macro Techniques 1.Stable Platform 2. Manual Focus 3.Depth of Field
  12. 12. Basic Macro Techniques 1.Stable Platform 2.Manual Focus 3.Depth of Field
  13. 13. Basic Macro Techniques 1.Stable Platform 2.Manual Focus 3.Depth of Field
  14. 14. DOF vs. Aperture 105 mm 1:1 @ Max. Magnification f/5 f/11 Wide open f/22 f/45 DOF is a fraction of a mm Centered on focus pointFocus DOF in front of focus point is “wasted” Subject is lessPoint than 1” deep Put Focus Point here for max “useful” DOF
  15. 15. Fixed Aperture; Changing Focus Point Image Size (& Composition) Changes 1. Focus point distance increases from left to right aboveExcept for focal point 2. Camera position & all other settings remain constantSame as previousslide at f/11 3. NOTE - Subject size shrinks as focus distance increases Won’t work for focus stacking (combining multiple exposures to increase DOF) But that’s another subject entirely (& a focusing rail job)
  16. 16. Hands On Time Hands-on Time• Stations – • Canon • Nikon • 4/3 & Mirrorless • Download & Review• Try your hand using the available accessories • Ask lots of questions • Have lots of fun

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