Equivalent focus lengths for small sensor to a FF (35mm) sensor

Started 1 week ago | Discussions thread
DaveR43 Senior Member • Posts: 1,311
Re: Field of View data...

CekariYH wrote:

Hi, have a question:

Sensor 1/2.8” (2MP) and a zoom-lens 25x (4.8-120mm)

What will the equivalent focus lengths be for a FF (35mm) sensor?

Thanks for answering!

How do one calculate that?

The data sheet you linked to later in the thread shows Field of View for Horizontal, Vertical and Diagonal

Horizontal field of view: 57.6° to 2.5°(Wide-Tele)
Vertical field of view: 34.4° to 1.4°(Wide-Tele)
Diagonal field of view: 64.5° to 2.9°(Wide-Tele)

The aspect ratio is different to FF; calculating the Diagonal Field of View for FF gives approximately 34 - 850 mm focal length equivalent.


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