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I don't quite get this 1.5x mutliplier thing

tl

Ames, US
201 posts

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tl Basic Member
Sat 10-Aug-02 08:52 PM

I think I'm overlooking something obvious, but when I see this description of the D series camera bodies that the effective focal length is increased by 1.5, what exactly does that mean?

For example, the D100 review by thom uses the illustration that the '20mm lens shows roughly the same angle of view as a 30mm lens'. Why is this so? I have the sense that the smaller-than-full-35mm size of the sensor is effectively cropping the field of view; so, if I take a photo with my 50mm f/1.4 on my F100, and crop/enlarge the resultant image in Photoshop Elements to the same angle of view as I would have gotten with a 75mm lens from the same spot, have I effectively done the same thing?


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Reply message RE: I don't quite get this 1.5x mutliplier thing
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Reply message RE: I don't quite get this 1.5x mutliplier thing
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Reply message RE: I don't quite get this 1.5x mutliplier thing
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Reply message No...
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     Reply message RE: No...
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          Reply message We are confusing absolute FOV with proportional FOV...
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Reply message RE: I don't quite get this 1.5x mutliplier thing
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     Reply message The FOV crop factor
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          Reply message RE: The FOV crop factor
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               Reply message You are correct in that...
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                    Reply message RE: You are correct in that...
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                         Reply message That's right...
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                              Reply message Film vs. digital
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                                   Reply message I've fixed the link...
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                                        Reply message A bit off topic, but...
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                                             Reply message RE: A bit off topic, but...
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                                                  Reply message RE: A bit off topic, but...
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                                                  Reply message You are confusing image pixels and printer dots...
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