ITG Forum

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ITG Forum

• High-Resolution Digital Photography with the
  Canon 1Ds
• ben grosser
• director, imaging technology group
• 9/23/2003

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Overview of the 1Ds

• High-quality tool for capturing digital images in
  any environment
• Excellent macro capability for capturing small
  objects
• SLR (single lens reflex) look through the lens
• High-resolution (output) 11MP (megapixel)
• low-noise CMOS sensor

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What Makes the 1Ds Unique (and/or Unusual)?

• Unique
• Resolution (Image and Sensor)
• Sensor size
• Sensor Noise (or lack thereof)
• Long exposure potential
• Enlargability / cropping potential
• Battery life (600 shots per charge)
• Unusual
• ISO Settings 100-1250
• DOF ability
• 45-point autofocus, AI-servo, dynamic focus
  tracking
• Macro ability combined with resolution and
  low-noise
• Capture speed (also fps)
• Weight
• Wide angle
• Environmental seals
• Traditional 32 format ratio

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Imaging Sensor

• Sensor type CMOS
• Sensor size 35.8mmx23.8mm
• Pixel pitch 8.8 x 8.8µm

G1 / 995 / etc.
1Ds
Sensor Physical Size Comparison
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Sensor Resolution

• Resolvable Resolution (in Lines/Picture Height
  divide by 2 for line pairs)

G1
1Ds

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Sensor Resolution 1Ds vs. Dissecting Microscope
1Ds 100mm f/2.8 macro
Dissecting Microscope 1x obj.
copper 200-mesh TEM grid (3.05mm diameter, 83.3um
holes, 37.5um wires)
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Sensor Resolution 1Ds vs. Dissecting Microscope
1Ds 100mm f/2.8 macro
Dissecting Microscope 1x obj.
250 um grid
250 um grid
Resolution 17 um
Resolution 6 um
25 um grid
25 um grid
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Image Resolution

• Image output resolution 4064x2704 11.1million
  output pixels (11MP)
• Image output filesize 32MB TIFF
• 300dpi 9x13.5 print
• easily withstands upsampling to 18x27 _at_ 300dpi,
  or 36x54 _at_ 150dpi

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Sensor Noise ISO 100
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Sensor Noise ISO 100 100
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Sensor Noise ISO 100 100
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Sensor Noise ISO 400
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Sensor Noise ISO 800
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Sensor Noise ISO 1250
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Sensor Noise ISO 100 vs. 400
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Sensor Noise ISO 100 vs. 800
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Sensor Noise ISO 100 vs. 1250
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Sensor Noise G1 vs. 1Ds
G1 ISO 400
1Ds ISO 400
1Ds ISO 1250
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Sensor Noise 15 minute exposure
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Essential Features List

• Exposure Modes (Av,Tv, P, M)
• Shutter speeds bulb 1/8000th sec.
• ISOs 100-1250
• Extremely fast recovery time (lt .5sec)
• Fast mirror blackout time (87ms)
• Up to 3fps continuous shooting for 10 frame
  bursts
• 45-point autofocus (single/continuous)
• Manual focus
• White Balance
• DOF Preview
• Portrait grip

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Lens Overview

• General Use Zoom Lenses
• 16-35mm f/2.8 L USM ultra-wide
• 24-70mm f/2.8 L USM standard zoom
• 70-200mm f/2.8 L IS USM - telephoto
• Prime Lenses
• 50mm f/1.4 USM normal
• 100mm f/2.8 macro USM

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Lenses 16-35mm f/2.8 L 16mm
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Lenses 16-35mm f/2.8 L 35mm
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Lenses 24-70mm f/2.8 L 24mm
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Lenses 24-70mm f/2.8 L 70mm
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Lenses 70-200mm f/2.8 L IS 70mm
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Lenses 70-200mm f/2.8 L IS 200mm
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Lenses DOF Example 50mm, f/22
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Lenses DOF Example 50mm, f/2
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Lenses DOF Example 70-200mm _at_ 160mm, f/22
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Lenses DOF Example 70-200mm _at_ 160mm, f/11
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Lenses DOF Example 70-200mm _at_ 160mm, f/2.8
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100mm f/2.8 Macro Lens

• 1x magnification
• 5.9 working distance at 1x
• Useful for close-up work anywhere
• MR-24EX Lens-mounted flash
• Macro flash unit
• Adjustable light positioning
• Flexible exposure modes
• Exposure settings (M)
• Aperture settings
• Tripod
• Lighted Copy Stand

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1Ds Macro vs. Dissecting Microscope
TEM Strain Holder -- dissecting microscope, .378x
magnification
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1Ds Macro vs. Dissecting Microscope
TEM Strain Holder 1Ds, 100mm macro, f/16, 80th,
ISO 100
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1Ds Macro vs. Dissecting Microscope 100
TEM Strain Holder -- dissecting microscope, .378x
mag
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1Ds Macro vs. Dissecting Microscope 100
TEM Strain Holder 1Ds, 100mm macro, f/16, 80th,
ISO 100
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1Ds Macro Examples
Somatic Embryogenesis from Grape Callus Mulwa,
Skirvin
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1Ds Macro Examples
Measuring the Length of the Corpus Callosum of a
Primate Brain W. Greenough (UIUC), J. Cameron
(Univ. of Pittsburgh)
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1Ds Macro Examples
Documentation of shipping damage to ZD4i
Depowdering Station for Z406
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1Ds vs. 35mm Film
Canon 1Ds / Canon 70-200 f/2.8L IS _at_ f/8. 100
ISOImages by Michael Reichmann
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1Ds vs. 35mm Film
Canon 1Ds Crop 100 _at_ 72dpi (32MB)
Canon 1V/Provia 100F Crop 100 _at_ 72dpiFilm
scanned with Imacon Flextight Photo Scanner at
3200ppi (35MB)
Images by Michael Reichmann
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1Ds vs. Medium Format Film
Canon 1Ds Crop 100 _at_ 72dpi
Pentax 645 w/ 200mm f/4 lens on Provia 100F 100
_at_ 72dpi -- Film scanned with Imacon Flextight
Photo Scanner at 3200ppi (100MB)
Images by Michael Reichmann
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Accessories

• Flash units
• SB-500EX
• General situations that call for lighting help
• Adjustable head (for bounce flash)
• Useful for fill flash
• MR-24EX
• Macro flash unit
• Adjustable light positioning
• Flexible exposure modes
• Timer Remote Controller
• Self timer
• Interval timer
• Bulb timer
• Tripod (with horiz. mounting option)

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Checkout, Image Formats, and Image Download

• Checkout
• Sign out on 1Ds calendar (http//www.itg.uiuc.edu/
  calendars)
• See someone in the VMIL (Dan, Ben, etc.)
• Select appropriate lenses, accessories
• Contact Dan for training if never used before
• Formats
• JPEG easy
• RAW flexible
• RAWJPEG easy and flexible
• Image Download (JPEG)
• Use supplied USB CF-card reader to download
  JPEGs to your PC
• Image Download (RAW)
• Install Canon software to convert RAW (.CRW)
  format images
• Both Formats
• Plug into any VMIL PC via firewire for automatic
  download to your home directory

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1Ds Flash Settings

• Macro Flash Settings
• Use Manual (M) Exposure
• Set shutter speed to 1/2xFL
• Set aperture to f/16 or f/32
• Leave flash on ETTL
• 550EX Flash Exposure Settings
• Use Program (P) Exposure for automatic
  calculations
• Use Av, Tv or M for evenly-lighted background and
  foreground (beware of too-slow shutter speeds!)

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1Ds No-Nos

• Dont try to clean the sensor ask a staff
  member to do it!
• Turn off the camera before changing lenses
• Angle the body lens opening down if possible when
  changing lenses
• Dont force the CF card into the slot
• Dont force anything (i.e. lenses, battery, etc.)
• Dont submerge it in water
• Only use L lenses for challenging atmospheric
  conditions
• Please point out any possible problems to staff
  when returning the camera

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General Photography Tips

• 1/focal length shutter speed for sharp photos
• Use a tripod
• Use as low an ISO as possible
• Use an appropriate focal length
• Only go as wide as you have to with a wide-angle
  lens
• Use a longer focal length for head shots (i.e.
  100mm )
• Use IS on 200mm lens.
• Watch your DOF
• Dont blow out the highlights (use histogram on
  LCD)
• Dont forget about white balance
• Consider the composition (i.e. rule of thirds)

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Acknowledgements

• Phil Askey, www.dpreview.com all images labeled
  with used with permission.
• Michael Reichmann, www.luminous-landscape.com,
  1Ds vs. Film Comparison Images. All images used
  with permission.
• Karl Garsha
• Scott Robinson
• Daniel Weber
• Chas Conway
• Aaron Grossman

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More Resources

• http//www.dpreview.com
• http//www.robgalbraith.com
• http//photonotes.org/articles/eos-flash/
• http//www.digitaljournalist.org
• http//www.luminous-landscape.com
• VMIL Staff (Dan, Ben)
• Canon 1Ds Manual