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Resolution Chart Comparison (JPEG)

Shots here are of our 'version two' resolution chart which provides for measurement of resolution up to 4000 LPH (Lines Per Picture Height). A value of 20 equates to 2000 lines per picture height. For each camera the relevant prime lens was used. The chart is shot at a full range of apertures and the sharpest image selected. Studio light, cameras set to aperture priority (optimum aperture selected), image parameters default. Exposure compensation set to deliver approximately 80% luminance of white area.

Sony DSLR-A380 (3.2 MB, 14 MP) Canon EOS 500D (4.4MB, 15.1 MP)
Nikon D5000 (3.5 MB; 12.3 MP) Olympus E-620 (6.4 MB, 12.3 MP)

Sony DSLR-A380 Canon EOS 500D
Nikon D5000 Olympus E-620

Sony DSLR-A380 Canon EOS 500D
Nikon D5000 Olympus E-620

Sony DSLR-A380 Canon EOS 500D
Nikon D5000 Olympus E-620

Measurable results

Camera Measurement
Absolute
resolution
Extinction
resolution
Sony DSLR-A380 Horizontal LPH 2300  * 2650 
Vertical LPH 2200  * 2650 
Canon EOS 500D Horizontal LPH 2350  * 2650 
Vertical LPH 2300  * 2600 
Nikon D5000 Horizontal LPH 2200  * 2650 
Vertical LPH 2100  * 2600 
Olympus E-620 Horizontal LPH 2200  * 2550 
Vertical LPH 2150  * 2550 

* Moire is visible
+ Chart maximum
LPH Lines per Picture Height (to allow for different aspect ratios the measurement is the same for horizontal and vertical)
Absolute resolution Point at which all lines of a resolution bar are still visible and defined, beyond this resolution loss of detail occurs (below Nyquist frequency).
Extinction resolution Detail beyond camera's definition (becomes aliased)

Again, in this test the A380's performance is pretty much identical to its predecessor's which is why we've left the A350 out of this comparison. Despite a slight softness in the JPEGs the Sony is doing a good job in this test and is almost on par with the 15.1 MP Canon EOS 500D. The image is also relatively clean from moire and other artifacts.

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