seems like aspherical correction elements, wide apertures and certain focal distances can make the onion highlites show up. Many lenses will do this, tho not always at all settings.
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Great buy on an INCREDIBLE lens!!! Every time I use mine I cannot BELIEVE its a zoom. You will freak at the sharpness.
My Rebels already sit in a drawer while I take my D5100s all over the place.
are you a collector of entry level cameras?
Not really. The supertele lenses are really optimized for sharpness. Lens design is all about tradeoffs. One lens known for particularly good bokeh (often described as 'creamy') is the 50mm f/1.2L. That lens is optimized for bokeh, and the way that's done is to undercorrect for speherical aberration in the lens design. When you do that, you get better bokeh, at the cost of a loss of some sharpness (and some focus shift, too).
Canon again acted like there was no one else on the market.
Why would you spend double as much as for the 24-105?
Why would you spend considerably more than for the Tamron 24-70?
I hoped this lens was supposed to be priced in the same league of the 17-40. Charging 1500$ for a 24-70 f/4 zoom is ridiculous.
Yep... mine gets dusty. It is just dust though... and does get blown off with a Giottos Rocket Blower. It is annoying... but worth the hassle (IMO) for the incredible image quality.