Could someone do the FULL math, please?

I'm getting a bit tired of all the frolicking about "fast" m4/3 (micro four-thirds) or other crop sensor lenses that are so much lighter and so much more compact than their full frame equivalents, and how people are wondering what Nikon or Canon will "do about that." Lately, Olympus's 40-150mm/2.8 telezoom gets a lot of … Continue reading Could someone do the FULL math, please?