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.
Best Lenses for Milky Way Photography: Fuji X. 1  The very best lenses for my personal favorite compact camera system for astrophotography: the Fuji X-Series. 2  The most common question asked on Lonely Speck answered for Canon shooters! 3  The lens is the most important factor in the image quality of a landscape astrophoto.