EXIF - What does this mean?

[Dmitri]

I looked at someones EXIF and it said, for Focal Length, "18.0mm (35mm equivalent: 27mm)". What does that mean? Is it 18mm or 27mm?

 

[PhotoXopher]

1.5 crop factor...

http://en.wikipedia.org/wiki/Crop_factor

 

[jcblitz]

I looked at someones EXIF and it said, for Focal Length, "18.0mm (35mm equivalent: 27mm)". What does that mean? Is it 18mm or 27mm?

It means the lens was dialed into 18mm, but it was effectively 27mm using a cropped sensor (like N0YZE pointed out).

 

[Dmitri]

ah ok, thanks for the info.

 

[Jaszek]

Check out the link in my sig. Its explained there