Convert Digital Camera Zoom to Binocular Power

An explanation and how to convert

The pictured digital camera was purchased because it has a 7x zoom, which I thought made it as powerful as my binoculars. In reality it did not seem to magnify like my binoculars. Now I know why.

The 7x is the result of dividing the small focal length number into the large focal length number giving what I think is meaningless result. In the case of the Nikon 6100 5 divided into 35 results in 7. (what the 5 and 35 actually represent is a whole other story)

To roughly convert to magnification like we know it divide the focal length by 50 and multiply the result by a brand specific factor. For Nikon and Cannon it is 1.5, for Panasonic 2. So this camera has a large focal length of 35 so 35 divided by 50 times 1.5 equals 1.05. Actual experiments seems to verify a magnification “power” much nearer 1 than 7.

The method described should yield a magnification close to reality but likely is not perfect. The factor described relates to sensor size and I can’t imagine a manufacturer using 1 size sensor in all its cameras.

More by this Author


Comments

No comments yet.

    Sign in or sign up and post using a HubPages Network account.

    0 of 8192 characters used
    Post Comment

    No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.


    Click to Rate This Article
    working