Answers.Body: <p>From the wikipedia entry on <a href="http://en.wikipedia.org/wiki/Focal_length" rel="nofollow">focal length</a>:</p>
  
  <blockquote>
    <p>Due to the popularity of the 35 mm standard, camera–lens combinations
    are often described in terms of their 35 mm equivalent focal length,
    that is, the focal length of a lens that would have the same angle of
    view, or field of view, if used on a full-frame 35 mm camera. Use of a
    35 mm-equivalent focal length is particularly common with digital
    cameras, which often use sensors smaller than 35 mm film, and so
    require correspondingly shorter focal lengths to achieve a given angle
    of view, by a factor known as the crop factor.</p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-03-04T04:19:43.310Z
Answers.Text: good explanation,thanks. I my camera says 4.25-42.5, that means that my wider angle would be 4.25mm? that seems too wide, I am sure I am getting something wrong
Answers.UserDisplayName: user17252
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-03-04T06:19:26.287Z
Answers.Text: Well, yes.  The wide angle on your camera is 4.25mm. But since your sensor is smaller than that of a 35mm camera, this is equivalent to a 30.4mm lens on a 35mm camera.  Alternatively, when your lens is fully zoomed in, it's focal distance is 42.5mm, which is equivalent to 305mm on a 35mm camera.
Answers.UserDisplayName: Jason Conrad
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-03-04T02:20:28.977Z
Answers.LastActivityDate: 2013-03-04T02:20:28.977Z
Answers.UserDisplayName: Jason Conrad
Body: <p>can someone explain this numbers please?, what means equivalent?<br>
  Focal Length 4.25-42.5mm, 35mm equivalent 30.4-305mm<br>
  thanks for your help</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-03-04T07:58:38.697Z
Comments.Text: This may be better migrating to Photography
Comments.UserDisplayName: Dr Mayhem
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-03-04T08:06:14.310Z
Comments.Text: Here's a relevant question at photo.stackexchange.com about focal length and angle of view: http://photo.stackexchange.com/questions/5917/what-is-angle-of-view-in-photography
Comments.UserDisplayName: Saaru Lindestøkke
Tags: <video><camcorder>
Title: how do I interpret this number?
UserDisplayName: user17252
ThreadText: # how do I interpret this number?
  
  (Asked by: username_0 on 2013-03-03)
  
  can someone explain this numbers please?, what means equivalent?  
  Focal Length 4.25-42.5mm, 35mm equivalent 30.4-305mm  
  thanks for your help
  
  **Tags:** video, camcorder
  
  > **Comments:**
  > **username_1**: This may be better migrating to Photography  
  > **username_2**: Here's a relevant question at photo.stackexchange.com about focal length and angle of view: http://photo.stackexchange.com/questions/5917/what-is-angle-of-view-in-photography  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_3 on 2013-03-04. Score: 1
  
  From the wikipedia entry on [focal length](http://en.wikipedia.org/wiki/Focal_length):
  
  > Due to the popularity of the 35 mm standard, camera–lens combinations
  > are often described in terms of their 35 mm equivalent focal length,
  > that is, the focal length of a lens that would have the same angle of
  > view, or field of view, if used on a full-frame 35 mm camera. Use of a
  > 35 mm-equivalent focal length is particularly common with digital
  > cameras, which often use sensors smaller than 35 mm film, and so
  > require correspondingly shorter focal lengths to achieve a given angle
  > of view, by a factor known as the crop factor.
  
  > **Comments:**
  > **username_0**: good explanation,thanks. I my camera says 4.25-42.5, that means that my wider angle would be 4.25mm? that seems too wide, I am sure I am getting something wrong  
  > **username_3**: Well, yes.  The wide angle on your camera is 4.25mm. But since your sensor is smaller than that of a 35mm camera, this is equivalent to a 30.4mm lens on a 35mm camera.  Alternatively, when your lens is fully zoomed in, it's focal distance is 42.5mm, which is equivalent to 305mm on a 35mm camera.  
  
  ---
  
  