benveniste
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- Nov 1, 2007
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I can think of a few reasons.
- For decades now, with the exception of "normal" lenses like a 50mm for 35mm film, "prime" lenses have been niche items. Nikon, for example, sells about 5 times as many 50mm lenses as 85mm. So the margin for the manufacturer has to be higher.
- 85mm is significantly different from 50mm. For example, you might take a "head-and-shoulders" portrait with an 85mm at around 5 and a half feet distance. With a 50mm, the same framing would require you to move in to about 3.25 feet. The difference in perspective is quite noticeable.
- Although this is an analog group, digital workflows allow people to examine their results at higher magnifications more easily. As a result, several manufacturers have created 85mm f/1.4 and f/1.2 lenses with better corrections of aberrations than in the film era.