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Old Jan 19, 2005, 11:40 PM   #1
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I am looking into getting a prime lens for a dSLR (Pentax *ist DS). Particularly a lens with a large aperature since I like the blurred background effects and taking dim lit photos w/o flash.

Many websites recommend 50mm for an all-purpose prime lens, however, these websites are for 35mm film. Since the dSLR has this 1.5x crop factor, should I look for a 35mm lens to give me the same view? 35mm lenses don't seem to be nearly as common.
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Old Jan 20, 2005, 10:15 AM   #2
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It all depends on what type of photography you are going to use. What is the crop factor of the *ist DS? Ah, 1.5. An 80mm lens really isn't that long. Less than twice what the human eye sees. Many people like using 80mm for portrait work, but others prefer the 50.

I think that many like the 50mm for two reasons. Small & light. Also, cheap. Its easy to carry around and it sees like you do so its easy to imagine what the shot will look like.

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