Previous page Next page

Resolution Chart Comparison (RAW)

Shots here are of our 'version two' resolution chart which provides for measurement of resolution up to 4000 LPH (Lines Per Picture Height). A value of 20 equates to 2000 lines per picture height. For each camera the relevant prime lens was used. The chart is shot at a full range of apertures and the sharpest image selected. Studio light, cameras set to aperture priority (optimum aperture selected), image parameters default. Exposure compensation set to deliver approximately 80% luminance of white area.

For a (more) level playing field we also convert our resolution tests using Adobe Camera RAW. Because Adobe Camera RAW applies different levels of sharpening to different cameras (this confirmed) we use the following workflow for these conversions:

  • Load RAW file into Adobe Camera RAW (Auto mode disabled)
  • Set Sharpness to 0 (all other settings default)
  • Open file to Photoshop
  • Apply a Unsharp mask: 80%, Radius 1.0, Threshold 0
  • Save as a TIFF (for cropping) and as a JPEG quality 11 for download
Nikon D3S (2.7 MB, 12.1 MP) Canon EOS 1D Mark IV (6.9 MB, 16 MP)
Nikon D3 (3.2 MB, 12.1 MP) Nikon D300S (3.2 MB, 12.3 MP)

Nikon D3S Canon EOS 1D Mark IV
Nikon D3 Nikon D300S

Nikon D3S Canon EOS 1D Mark IV
Nikon D3 Nikon D300S

Nikon D3S Canon EOS 1D Mark IV
Nikon D3 Nikon D300S

Measurable results

Camera Measurement
Absolute
resolution
Extinction
resolution
Nikon D3S Horizontal LPH 2300  3300 
Vertical LPH 2250  3100 
Canon EOS-1D Mark IV Horizontal LPH *2500  * 3600 
Vertical LPH * 2500  * 3400 
Nikon D3 Horizontal LPH 2300  3300 
Vertical LPH 2250  3100 
Nikon D300S Horizontal LPH 2300  3200 
Vertical LPH 2250  3200 

* Moiré is visible
+ Chart maximum
LPH Lines per Picture Height (to allow for different aspect ratios the measurement is the same for horizontal and vertical)
Absolute resolution Point at which all lines of a resolution bar are still visible and defined, beyond this resolution loss of detail occurs (below Nyquist frequency).
Extinction resolution Detail beyond camera's definition (becomes aliased)

Shooting in RAW and using Adobe ACR to process the images increases the measured resolution on all four cameras, although as expected, the more densely populated sensor of the Canon EOS-1D Mark IV resolved the highest detail when presented with our test chart. To any practical extent, the D3S gives identical resolution, again, to its predecessor the D3, and to the DX format D300S.

Previous page Next page
224
I own it
68
I want it
69
I had it
Discuss in the forums

Comments

Barney Britton
0 upvotes