articles/Cameras/fives-page4

All at sixes fives and sevens - part 4 of 1 2 3 4 5

by Jon Ashton Published 01/12/2012

Colour Testing

We did not pass up the opportunity to test the colour accuracy of the 5D. We shot bracketed sequences of a Macbeth Chart and then applied the Rags Gardner ACR calibration and audit methods. This was done at 200, 400, 1600 and 6400 ISO settings. The average residual errors ranged around 3.75 ?E00 and in the main the Raw camera calibration settings were similar across the ISO range. Although the values were not outstanding, the very cool light quality (10,000 Kelvin) might have compromised them and the colours were perfectly acceptable for professional use. At each ISO setting the exposure accuracy was within three tenths of a stop.

This heron was not even visible in the gloom! At the other end of the scale (above left) the chip copes well boring right into the sunshine.

• All at sixes fives and sevens page 1
  
• All at sixes fives and sevens page 2
  
• All at sixes fives and sevens page 3
  
• All at sixes fives and sevens page 4
  
• All at sixes fives and sevens page 5
  

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