Posts Tagged ‘diffractive optics’

Crows and Ravens vs. Hawks Above Golden Gate Park – The Eternal Struggle.

Thursday, May 1st, 2008

This poor red-tailed hawk was minding its own business in San Francisco’s Golden Gate Park just before an aerial assault from a couple of American crows.

Of course, part of the business of hawks is raiding the nests of crows and ravens, so this kind of harassment is understandable.

As always, click to enlarge:


Canon 400mm f/4.0 DO IS Diffractive Optics lens at f/8.0. (Too expensive, overrated, has weird bokeh at times, needs to be stopped down, lacks a focus preset ring, but aside from that a decent lens I s’pose. I got a good deal on a used copy then I later sold it for the same price, so I guess that’s Even Steven. Canon’s 300mm 2.8 IS design from the 1990’s remains superior. Canon would have been a lot better off investing resources devoted to the Diffractive Optics program on something else, it would seem…)