Petite question:
je ne comprends pas bien le sens de la phrase :

7 pairs of the three central F2.8 + F5.6 8 to the double cross, all 19 points cross-type AF system for high-resolution digital SLR cameras, the ability to accurately capture the various scenarios of Pi Sheti high-performance auto-focus system is even more important. EOS 7D carrying as many as 19 of the automatic focus, and to increase the focus of each of the focus accuracy.

Techniquement cela veut dire quoi?
Merci.