Lens Recommendation

Started Feb 2, 2013 | Discussions thread
EKB Regular Member • Posts: 317
Re: Lens Recommendation

Stuntflyer wrote:

Okay, so I have another question. . .

If my D5100 with the 35/1.8 fills the frame for my test subject at 5 feet, at what distance would the 50mm and 85mm fill the frame for the same subject?

Distance-to-subject is proportional to focal length (given a fixed subject-width and sensor-size), so the distance for a 50mm would be 5 ft x 50mm/35mm or 7.1 ft, and the distance for 85mm would be 5 ft x 85mm/35mm or 12.1 ft.

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