LSAT 110 | Section 2 | Logical Reasoning: Q16

LR Question 16 Explanation

QUESTION TEXT: The argument depends on assuming which one…

QUESTION TYPE: Necessary Assumption

CONCLUSION: The sorts of differences in lens resolution typically advertised are irrelevant for practical photography.

REASONING: Modern lenses are so good that they project much more detail than can be reproduced in a developed image. The advertised differences in lens resolution don’t make a difference.

ANALYSIS: The argument is assuming that there are no effects of increased resolution apart from the amount of detail projected onto film.

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1. This is hard to understand, but it’s saying that the argument is assuming that resolution is not an important part of camera quality. The argument actually assumes the opposite. Resolution is very important, but all cameras now have such good resolution that the differences are meaningless. 
2. CORRECT. If differences in resolution do make film’s deficiencies worse then it is important to know what the resolution of a camera is. 
3. This shouldn’t matter because the stimulus says that resolutions project far more detail than film can capture. So even a significant impact seems unlikely to have an effect. 
4. Who cares? The resolution projects so much detail that it’s irrelevant if and how we can hit the maximum. The pictures will all look the same.
5. It seems likely that there are other factors that affect picture quality. But that wouldn’t hurt the argument that differences in one factor, lens resolution, are irrelevant.