Narrow Field of View

   / Narrow Field of View #21  
Digital camera's, thier CCD's to be more specific, have some amount of inherent magnification as compared to film. If you have a 100mm lens, when it is installed on a Digital SLR, it is effectively about 120mm. The same goes for the low end; a 28mm is equivilant to a 35mm lense, or there abouts(I know my numbers are wrong, but at least in the ball park.

If you are doing landscape, and want wide angle, you would need something like a 20mm lens to give you the equivilant of the 28mm lens.

Used to run in to this with microscopes. The picture on the monitor did not match the size of the picture in the eyepieces. An additional reducing lens could be put in the camera path to make it match closer.
 

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