[ptx] Getting EXIF data from coolpix 950 jpgs using hugin

[Ippei UKAI]

I think it's easier to get it from the ratio between the focal length  
of the lens and the 35mm equivalent of it. Not many catalogues do not  
state the CCD size anyway.

If you have:
  Focal Length: f=7.9-23.7mm [35mm Film Eq: 38-114mm]
then:
  Crop Factor = 38/7.9 = 114/23.7 = 4.81

Ippei

On 2 Dec 2005, at 23:45, Hal V. Engel wrote:

> I think when you see something like the 1/2.4" specification for a  
> sensor size
> that you are getting the diagonal size of the CCD.   So to  
> calculate the crop
> factor you need to compare that to the diagonal length of a 35mm  
> frame which
> is (24 ^ 2 + 36 ^ 2) ^ 0.5 = 42.3mm which gives a crop factor of 4.05
>
> On Friday 02 December 2005 11:07 am, David Haberthür wrote:
>> hey glenn,
>> thanks for posting this to the [ptx]-list.
>> as i'm rather new with hugin, and never bothered to get the correct
>> crop factor (and did get rather good panoramas...) i'd like to ask if
>> my calculation below is correct:
>>
>> my camera has a 1/2.4" sensor (according to http://www.steves-
>> digicams.com/2004_reviews/t3.html ). in metrical units this results
>> in a size of 10.6 mm.
>> hence my crop factor would be something like 3.4, is that correct?
>>
>> thanks for the help.
>>
>> habi
>


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