1 Proterozoic: this eon refers to the time from the lower Cambrian boundary, 541.0 Â± 1.0 Ma, back through 2500 Ma. 2  As originally used, it was a synonym for Precambrian and hence included everything prior to the Cambrian boundary.
Canon's 50-megapixel EOS 5DS is the highest-resolution full-frame DSLR ever. If you thought the megapixel wars were over, think again: Canon's latest DSLRs cram just over 50 of them into a full-frame sensor.
Top 10 Professional HD Video Cameras. Sony PMW-300 One XDCAM, The best in HD today. One of Sonys newest professional camcorders is listed first in our top ten. This camera is suitable for a wide range of applications and is already proving itself out in the field. The Pmw-300 has an EX mount lens system that is compatible with 1/2â³ & 2/3â³ lenses.