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Canon 1Ds Mark III Tethered in OSX 10.5.6 vs 10.5.5
Apple recently updated their operating system OSX to 10.5.6. This update contained a long awaited optimization of their USB drivers. Combined with the beta with Capture One 4.6 which includes many performance boosts we tested a Canon 1Ds Mark III tethered to our 8-core Mac Pro.
Testing notes:
Software: Capture One 4.6 Beta
Hardware: Mac Pro 2.8 Ghz Eight-Core with 10gb of Ram, Canon 1Ds Mark III at ISO 100*
Tethered setup: shooting to a folder on the main hard drive
*Shooting at higher ISO slows tethered shooting
Definitions:
Time Between Shutter Release and Preview: the time between the end of the shutter release and the display of a full-and-final preview image appears on the computer. In Capture One this is measured as time until the high-res preview with styles applies rather than the low-res preview that is initially displayed.
Maximum Shutter Releases: the total number of shutter releases possible, even if those images are still in the buffer at the end of the timed period
Maximum Transferred to Computer: the total number of shots which have transferred to the computer at the end of a timed period. This includes images for which a full-and-final preview has not been created. Measured by the number of thumbnails seen in the browser at the end of the timed period.
Burst Lag: time needed to display the full-and-final preview of the last shot of a burst (i.e. time needed to clear the buffer)
Results Summary
| Type of Speed | 1Ds III Raw [10.5.6] | 1Ds III Raw [10.5.5] | Difference |
|---|---|---|---|
| Capture-to-Preview | 4.5 sec | 9.5 sec | 2.1x |
| Shutter Releases / 1 min | 65 releases | 28 releases | 2.3x |
| Shutter Releases / 2 min | 113 releases | 42 releases | 2.7x |
| Transfered / 1 min | 51 images | 13 images | 3.9x |
| Transfered / 2 min | 101 images | 27 images | 3.7x |
| Burst Lag | 19 sec | 63 sec | 3.3x |
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[h5]
Canon ISO Test
The following test shows the noise response and exposure characteristics of the 1D Mark III, the 5D, and the 40D. Ambient temperature was approximately 75°F.
Click on the thumbnail to open in your browser at 100%. Or right click (or CTRL click) on the image and select download or save as to download to your computer.
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