The Diafun series is Zeiss' "entry-level" binocular though the term hardly seems appropriate. Zeiss' enviable technologies are packed into this binocular and they'll perform optically as one would expect from a Zeiss product.
T* anti reflective multicoatings and P*phase correcting prism coatings give the Diafun a sharp image with abundant contrast. They weigh a hair under half a kilo but are built to withstand abuse: temperature and precipitation extremes can be handily ignored.
The Diafun is less than half the price of the Victory and Classic series but nonetheless offers traditional Zeiss quality for those seeking true value. A 10x30 binocular is good for birding sports events and general use in medium overcast or brighter conditions.