The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations ...

At 10mm, central sharpness is excellent at f/1.7, outstanding from f/2 to f/4, excellent at f/5.6 and f/8, very good at f/11 and still good at f/16, although diffraction at this point is taking a ...

At 25mm, central sharpness is excellent at f/1.7, outstanding from f/2 to f/5.6, excellent at f/8 and still very good at f/11 and f/16. The edges are very good from f/1.7 right through to f/8 and ...