Twyman's Law is a principle related to the performance of optical systems, particularly in the context of optical imaging and lens design. It states that "the better a lens appears to be in a critique, the worse its performance actually is." Essentially, it suggests that a lens that seems to have excellent optical characteristics based on subjective assessments or superficial tests may actually have significant flaws in actual performance. This law highlights the importance of rigorous testing and measurement over subjective judgment when evaluating optical systems.
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