The K-7 is Pentax’s top digital SLR and is aimed at enthusiasts and professionals. The built-in anti-shake, distortion correction and aberration removal are excellent, but Pentax’s lens range is patchy.
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Dynamic range is a camera’s ability to record extremes of light and dark. It didn’t concern film photographers much because film generally has a high dynamic range, but digital sensors are different. Too much light will ‘overload’ the photosites so [...]
Distortion is where straight lines become curves or appear to converge, and it comes in two types: perspective distortion and lens distortion. Perspective distortion is natural and inevitable. It’s when the tops of tall buildings appear to converge or railway lines [...]