12 THE HASSELBLAD MANUAL
especially the size of the sensor, the size of the pixels, and the performance of the lenses.
Lenses of questionable quality limit the image sharpness in digital recording as they do in
fi lm photography but to an even higher degree. In digital cameras, the performance of the
lenses, especially in regards to the chromatic abberation, distortion, and image brightness in
the corners of the images, can be improved somewhat by what is known as DAC (digital auto
correction). This correction, however, shows benefi ts only in an image that is recorded with a
hight quality lens. Some camera manufacturer’s claim may give the impression that a specifi c
camera produces higher quality images because of DAC. Such a statement is not based on any
true facts.DAC does not produce high quality in an image taken with a lens of questionable
Figure 2-1 Digital Sensor size comparison. The Hasselblad sensor sizes, with the 36.7 49.0
sensor on bottom right, the 36.7 36.7 sensor in the middle right, and the 33.1 44.2
sensor at the top right are shown in comparison to the sensor sizes in other digital cameras.
All three Hasselblad sensors are considerably larger than the full frame sensor of 24 36 mm
(bottom left) found in a few digital SLR cameras, and much larger than the more common
sensors, the APS type with a size about 15 23 mm (middle left) found in most professional
SLR cameras and the even smaller Compact type (top left).
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