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 highest resolution available in an affordable film scanner (around $1000 US) is 4000 dpi. In this page we address the question, How much better could you do at 8000 dpi?, using the techniques developed in parts 1 and 2 of Understanding image sharpness. This is akin to asking, What are the ultimate limits of 35mm detail?