Pola Screens and their Applications to the Photography of Glassware

JSGT_1936_V20_T123_T126

The construction, properties and applications of Pola screens are outlined. Light is scattered to a slight extent by the screens, and a lens hood on the camera is advisable when using them. The use of such screens permits the high lights of a subject to be reduced, and their application to the photography of glassware is discussed. The screens transmit all wavelengths from 4000 to 7000 Å, the ultra-violet is strongly absorbed, and the infra-red almost completely transmitted. The use of a water filter between the screen and light source ensures against overheating, although the screens are fairly heat resistant.

J. L. Houghton