Effective Focal Length

Famous quotes containing the words effective and/or length:

“An effective human being is a whole that is greater than the sum of its parts.”
—Ida P. Rolf (1896–1979)

“At length they all to merry London came,
To merry London, my most kindly nurse,
That to me gave this life’s first native source;
Though from another place I take my name,
An house of ancient fame.”
—Edmund Spenser (1552?–1599)