Interesting blog post regarding lighting and the influence on autofocus
- Canon Lenses
- 3 Replies
I'm really not sure what to make of this. For example, comparing the three lenses tested in 'daylight' illumination, for the 40/2.8 the red and blue 'best focus' are adjacent and the green is an outlier, for the 24-70/2.8L II the blue and green are adjacent and the red is an outlier, and for the 85L all three are well-spaced. The 24-70 has the largest absolute spread, however, the 85L has the most axial CA of the three lenses, by far.
One thing that I'd be very interested in seeing, given FoCal's recommendations for lighting conditions during testing: is there a difference in FoCal's reported AFMA values for testing in 'daylight' (e.g. full sun, 5500K) vs. tungsten (2900-3200K) lighting.
Worth noting that Rich states, "...there’s not enough data to draw any serious conclusions."
One thing that I'd be very interested in seeing, given FoCal's recommendations for lighting conditions during testing: is there a difference in FoCal's reported AFMA values for testing in 'daylight' (e.g. full sun, 5500K) vs. tungsten (2900-3200K) lighting.
Worth noting that Rich states, "...there’s not enough data to draw any serious conclusions."
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