Test Your Digital Camera's Vision !

#1 Download the Chart

And print it.

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#2 Photograph It

From about 8-ft.

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#3 Select the Pattern


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#4 Measure it

Measure the pixel width.

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#5 Calculate Camera Clarity

Measured Pixel Width Camera Mpix Rating Effective Mpix =
What Does The Result Mean ?

Some CT-EyeChart © Test Results

Camera Type Lens Aperature Focus Format Mpix Rating Pix Width Ratio Clarity (Mpix)
Canon 40D 28mm f-8 Manual JPEG 10.1 54 0.53 5.3
Canon 40D 28mm f-8 Manual RAW 10.1 49 0.56 5.6
Panasonic FZ35 27mm+ f-2.8+ Auto JPEG 12.1 54 0.42 5.08
Canon S2-IS 36mm+ f-2.7+ Auto JPEG 5.0 60 0.38 1.90

  • DSLR pixels (Digital Single Lens Reflex) are similar to Compact Digital camera pixels -- but they are not the same.
  • The most common difference between DSLR pixels and non-DSLR pixels is primarily the sensor technology; CMOS for DSLR pixels and CCD for Compacts.
  • CMOS half/full-size DSLR pixel array sensors are physically larger and have the same 3:2 aspect ratio as 35mm film whereas most Compact digital cameras are a 4:3 ratio.
  • The DSLR pixels of CMOS sensors generally have larger per-pixel area so are less noisy and have better sensitivity then CCD imagers.
  • However, the basic design of nearly all digital cameras has fundamental 'features' which make the effective clarity much lower than the camera Mpix rating under typical 'point-n-shoot' mode.
  • Fortunately, DSLR camera's have RAW mode which can help -- when combined with the necessary post-processing computer tools. More ...