David Cardinal: Saving Your Photo Safari with Datacolor’s SpyderLensCal
Jun 2012 10

A common complaint among serious photographers is that their cameras don’t focus accurately. “Back-focus” and “front-focus” are both dreaded ailments that can plague any SLR (digital or film) and lens combination. Fresh from the factory, lens and camera are supposed to be calibrated so this doesn’t happen. However, not only does that not always occur, but once a lens and camera are in the field, it is only a matter of time before slight changes in the alignment can cause focus to drift.

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