Fo­cus stack­ing – the ul­ti­mate so­lu­tion

NPhoto - - Nikopedia -

■ There are op­ti­cal lim­its to depth of field. One is that at very small aper­tures, such as f/29, the im­prove­ment in depth of field is off­set by ‘dif­frac­tion’, which pro­duces a soft­ness in de­tail. Another is the high mag­ni­fi­ca­tion needed in macro pho­tog­ra­phy, which means that even at a very nar­row aper­ture like f/22, depth of field is mea­sured in mil­lime­tres when shoot­ing close-ups. One so­lu­tion that gives the im­pres­sion of deep fo­cus is fo­cus stack­ing, which in­volves tak­ing a se­quence of iden­ti­cally framed shots, and chang­ing the fo­cus from one to the next. Spe­cial­ist soft­ware, such as Heli­con Fo­cus used here, can com­bine the sharpest ar­eas from each frame into a sin­gle im­age, ad­just­ing for the slight changes in scale as it does so.

Newspapers in English

Newspapers from Australia

© PressReader. All rights reserved.