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.
The world's smallest and lightest full-frame digital SLR (as of September 17, 2012) opens new doors to creative photographers. It's really the first EOS model simultaneously targeting the serious photo enthusiast, as well as a perfect step-up SLR for those seeking the image quality inherent in a full-frame camera. Full-frame is the key â the 20.2 million pixel CMOS sensor delivers excellent image quality, and ISOs ranging from 100~102,400.