Zoom Lens at Millers Falls.

A ‘zoom lens’ is a lens with adjustable focal length. Often the term is confused with a telephoto. Where a zoom lens may be a telephoto, it isn’t necessarily so.

In the case of my 18-135mm Fujinon lens, this is a wide-angle to medium telephoto range zoom.

I used this to good advantage the other day at Millers Falls, Massachusetts to make a sequence of photos of New England Central’s southward road freight 611.

Both of these photos were exposed from the same vantage point. All I did was adjust the focal length of the zoom as the train approached.

Telephoto view; 18-135mm zoom lens set at 116mm (equivalent of 174mm on a 35mm film camera).
Wide angle view from the same vantage point. 18-135mm Fujinon zoom lens set to 23.3mm (equivalent to a 35mm lens on a traditional 35mm film camera.) Incidentally; when making these comparisons it is crucial to distinguish between historic  film size and the focal length of the lenses. Both photos were exposed digitally.

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