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Old Feb 4, 2008, 7:11 AM   #1
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Hello Guys

This is my first post in your Forum....!

Well I Have a Nokia N95 Phone and I want to know it's 35mm Equivalent Focal Length...it's Digital Focal Length is 5.6mm and it's aperture is 2.5/5.6



any one can give me 35mm equivalent Focal length? any table or formula??



thanks
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Old Feb 4, 2008, 7:28 AM   #2
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The equivalent 35mm focal length is determined by the focal length of the lens and the size of the image sensor. The information you've provided doesn't include the size of the image sensor, and I can't seem to find it anywhere else.

You could determine the approximate angle of view of the N95, and determine the equivalent 35mm focal length from that.
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Old Feb 4, 2008, 8:09 AM   #3
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Thanks Friend

I've Tried to find the sensor size...but i coul'nt find the size

I'll Calculate the angle of view then i'll conclude the focal length



thanks again


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Old Feb 5, 2008, 3:09 AM   #4
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I've Calculated the angle was about 54.24mm which is 35mm focal length

thax


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Old Feb 19, 2008, 8:07 AM   #5
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A typical point and shoot camera, film or digital,has 35 to 38mm focal length in 35mm film camera equivalent, at minimum zoom.

Note that the size designations for digital sensors:1/1.7, 1/2.5, etc., although they are perfectly reduceable fractions that can be converted into ordinary decimals like 0.558 or 0.400 etc., are not actual sensor sizes in inches.

To determine the 35mm equivalent focal length not otherwise published,

(1) Multiply the focal length printed on the lens by 43-1/4 (diagonal of a 35mm film frame)and then divide by the actual diagonal of the sensor in millimeters, or,

(2) Ask the manufacturer.

Aperture does not give any information about 35mm equivalent focal length.

Digital camera hints: http://members.aol.com/ajaynejr/digicam.htm

(43.25 divided by the sensor diagonal is a number called the crop factor.).




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