Canon EF 400mm f/2.8 Canon EF 600mm f/4 serie III

“ Ma come possono peggiorare a livello ottico. Impossibile. „

“ Featuring carefully refined optics, the EF 400mm f/2.8L IS III USM offers a familiar feel to its predecessor while being even more comfortable to handle thanks to its significantly lighter build. Super UD lens elements offer improved image quality while being more compact in size, while the Image Stabilizer unit has also had its weight reduced. This results in a lens that's more than twenty-five percent, or approx. 2.20 lbs., lighter than its predecessor. Optical placement has also been improved, with the center of gravity now closer to the rear. This allows users to position the lens more easily for fast framing of moving subjects. „

“ Io non confronterei due obiettivi secondo gli MTF, pubblicati dai relativi costruttori, il punto chiave è che Canon ha pubblicato dei grafici leggermente inferiori come prestazioni alle versioni sostituite „

“ Secondo te mettono in commercio tele a livello ottico inferiori ai pre? „

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Upgraded Optical Image Stabilization from three-and-a-half stops to five shutter speed stops1 of correction over the previous f/2.8 lens
Improved, flexible focus control with a customizable electronic-focus ring
Two fluorite lenses and one super UD lens, helping to provide high image quality
Circular nine-blade aperture
17 lens elements in 13 groups
Heat-shielding paint helps prevent lens temperature from rising during excessive exposure to sun
Fluorine coating on front and rear optical elements, helps to reduce smears and fingerprints
Inner focusing system with Ring Ultrasonic Motor „