Canon EOS 5D Mark IV with EF135mm f/2L USM Lens Calibration Test Information

 Overview

 

 

Property Description
Data Creation FoCal Version 2.6.5.3996M
Data Analysis FoCal Version 2.6.5M
OS Version OS X 10.11.6
Source Mode Camera Mode
Image Capture Mode JPEG
Analysis Method Multi-ESH (RGB)
Camera Model Canon EOS 5D Mark IV
Firmware Version 1.0.1
Serial Number 22021008247
Camera Temperature 33C
Test Colour Temp 5200K
Lens EF135mm f/2L USM
Focal Length 135mm
Termination Reason Success
Test Aperture f/2.0
Test ISO 400
Defocus Method Large defocus away from the camera
Distance to Target 4.6m
Starting AF Microadjustment 0
Tested AF Microadjustment Range Full (-20 to 20)
AF Microadjustment Step Size Auto
AF Consistency Constraint 6%
Total Shot Count 14
Calculated AF Microadjustment +5
Result Confidence Excellent
Consistency of Focus 99.4%

 

Test Details

Lens Profile Chart

The Lens Profile chart shows how the image quality changes as the AF Micro-adjustment changes. The orange line represents how the sharpness is expected to change through all values, so the highest point on this line corresponds to the best predicted AF Micro-adjustment value.

 

Each point on the chart represents the result of a single shot:

 

  • Red marker: unoptimised sharpness

-- Green marker::optimises sharpness

  • Orange circle within marker - this is the representative sharpness for this AFMA
  • Orange curve - the predicted sharpness across the AFMA range
  • Green triangle - highest value
  • Red triangle - lowest value

Lens Calibration for Canon EOS 5D Mark IV with EF135mm f:2L USM

Before/After Comparison

The images show the before and after shots.

 

AF

Microadjustment

Before 0
After +5

 

 

RGB Analysis Chart

The RGB Analysis chart shows the predicted sharpness across the AF Microadjustment range for red, green and blue light. The vertical lines indicate the predicted best AF Microadjustment for each of the 3 colours.

 

It is important to note that when run in JPEG mode, there is some contamination between the colours so the result is not truly representative.

Property Description
Red:  
Red Result +3
Red Confidence Excellent
Green:  
Green Result +7
Green Confidence Excellent
Blue:  
Blue Result +5
Blue Confidence Excellent

 

AF Microadjustment: -20

The following table shows information obtained for this test point:

  Shot 1 Shot 2
Aperture f/2.0 f/2.0
Shutter Speed 1/800s 1/800s
EV 9.5 9.5
Colour Temperature 5077K 5077K
Camera Temperature 32C 32C
Quality Measure 906.8 908.5
Optimised No No
Ignored No No
Spectral Power (R/G/B) 33/32/35 33/32/35
Red Quality 975.3 985.3
Green Quality 831.7 830.6
Blue Quality 910.1 908.6
HVR 1.3% 1.1%

 

AF Microadjustment: -10

The following table shows information obtained for this test point:

  Shot 1 Shot 2
Aperture f/2.0 f/2.0
Shutter Speed 1/800s 1/800s
EV 9.5 9.5
Colour Temperature 5077K 5077K
Camera Temperature 32C 32C
Quality Measure 1171.3 1180.7
Optimised No No
Ignored No No
Spectral Power (R/G/B) 33/32/35 33/32/35
Red Quality 1243.5 1254.8
Green Quality 1111.4 1118.0
Blue Quality 1166.3 1172.4
HVR -0.7% 0.4%

 

AF Microadjustment: 0

The following table shows information obtained for this test point:

  Shot 1 Shot 2
Aperture f/2.0 f/2.0
Shutter Speed 1/800s 1/800s
EV 9.5 9.5
Colour Temperature 5077K 5077K
Camera Temperature 32C 32C
Quality Measure 1565.4 1580.7
Optimised No No
Ignored No No
Spectral Power (R/G/B) 33/32/35 33/32/35
Red Quality 1584.0 1603.5
Green Quality 1552.7 1573.0
Blue Quality 1556.7 1570.0
HVR 1.4% 2.0%

 

AF Microadjustment: 5

The following table shows information obtained for this test point:

  Shot 1 Shot 2 Shot 3
Aperture f/2.0 f/2.0 f/2.0
Shutter Speed 1/800s 1/800s 1/800s
EV 9.5 9.5 9.5
Colour Temperature 5077K 5077K 5077K
Camera Temperature 33C 33C 33C
Quality Measure 1679.2 1689.2 1700.9
Optimised No No No
Ignored No No No
Spectral Power (R/G/B) 33/32/35 33/32/35 33/32/35
Red Quality 1690.3 1652.9 1675.4
Green Quality 1690.9 1729.1 1741.4
Blue Quality 1655.4 1666.0 1667.0
HVR 1.4% 0.2% 0.7%

AF Microadjustment: 10

The following table shows information obtained for this test point:

  Shot 1 Shot 2
Aperture f/2.0 f/2.0
Shutter Speed 1/800s 1/800s
EV 9.5 9.5
Colour Temperature 5077K 5077K
Camera Temperature 32C 32C
Quality Measure 1593.5 1572.3
Optimised No No
Ignored No No
Spectral Power (R/G/B) 33/32/35 33/32/35
Red Quality 1509.2 1481.9
Green Quality 1703.3 1688.2
Blue Quality 1571.0 1544.8
HVR 0.7% -0.6%

 

AF Microadjustment: 20

The following table shows information obtained for this test point:

  Shot 1 Shot 2 Shot 3
Aperture f/2.0 f/2.0 f/2.0
Shutter Speed 1/800s 1/800s 1/800s
EV 9.5 9.5 9.5
Colour Temperature 5077K 5077K 5077K
Camera Temperature 32C 32C 33C
Quality Measure 1223.2 1355.5 1219.1
Optimised No No No
Ignored No No No
Spectral Power (R/G/B) 33/32/35 33/32/35 33/32/35
Red Quality 1117.6 1234.9 1112.2
Green Quality 1337.6 1486.0 1332.4
Blue Quality 1220.6 1350.5 1218.9
HVR -2.1% -2.3% -2.0%

Lens Profile

The Lens Profile chart shows how the image quality changes as the AF Microadjustment changes. The orange line represents how the sharpness is expected to change through all values, so the highest point on this line corresponds to the best predicted AF Microadjustment value.

 

Each point on the chart represents the result of a single shot:

 

  • Red marker: unoptimised sharpness
  • Green marker: optimised sharpness
  • Orange circle within marker - this is the representative sharpness for this AFMA
  • Orange curve - the predicted sharpness across the AFMA range
  • Green triangle - highest value
  • Red triangle - lowest value

 

Focus Consistency

The Focus Consistency chart shows the focus variability at each tested point where available. This is calculated from the spread in sharpness values from shots at a single AF Microadjustment value.

 

A value of 100% indicated perfect repeatability. In normal use, a values above 97% indicate acceptable autofocus repeatability, and above 99% indicate very good repeatability. Note that the consistency of focus measurement is less relevant far from the best AF Microadjustment value.

 

If FoCal Comparison Data is available for this camera and lens a red/blue/green overlay will be added to indicate how your camera and lens performance compares with other users as follows:

 

  • Red: indicates below-average performance,
  • Blue: typical performance experienced by other users
  • Green: above average

Astigmatism Factor

The Astigmatism Factor chart shows the image quality ratio between the horizontal and vertical analysis directions. If this value varies by more than 10% across the range, or the average value is more than +/- 5% then your lens may be suffering from some decentering or lens element alignment issues.

 

If FoCal Comparison Data is available for this camera and lens a red/blue/green overlay will be added to indicate how your camera and lens performance compares with other users as follows:

 

  • Red: indicates below-average performance,
  • Blue: typical performance experienced by other users
  • Green: above average

 

Result Convergence

The Result Convergence chart indicates how FoCal determined the best AF Microadjustment value as more points were added to the data. There is no result for the first few points, then the result should stabilise as more points are added towards the end of the test (the right side of the chart).

 

The size of the green area gives an indication of the confidence in the result at that point. A large green area spreading across many AF Microadjustment values indicates poor data that will not give an acceptable final result.

 

Image Motion

As changes are made inside a lens (e.g. focussing or aperture change), the image projected onto the sensor can move slightly. The Image Motion chart shows the absolute number of pixels moved for each image compared to the first image captured.

 

Typically, the Image Motion should be significantly less than 10 pixels, and a repeatable higher value could indicate misaligned lens optics, camera movement or vibration during the test or other environmental or lens issues.

 

If FoCal Comparison Data is available for this camera and lens a red/blue/green overlay will be added to indicate how your camera and lens performance compares with other users as follows:

 

  • Red: indicates below-average performance,
  • Blue: typical performance experienced by other users
  • Green: above average

Front/Back Focus

The Front/Back Focus chart gives an indication of the amount of front or back focus would be experienced at any particular AF Microadjustment value.

 

The green band down the centre is very approximately the range of the depth-of-field, so AF Microadjustment values within this range should give reasonable focus results.

 

Note: The line is fitted to the average of the data points, and poor quality data can lead to significant deviations of this curve from real focus positions. It's important to interpret this metric in conjunction with the quality of the data - poor focus consistency or poor overall results will mean this metric is of little value.

 

 

 
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