The Refresh line up is as follows:

The EF 1.4X Extender and the EF 2x Extender which are supposed to offer faster autofocus and  improved autofocus precision. There’s also talk of “an anomalous dispersion lens element for reduced chromatic aberration” -whether this is new from the Series II teleconverters, I’m not certain. They’ve also got this high-falutin new flourine anti-smear coating -somehow repelling both oil and water for cleaning with a dry cloth -and this coating is applied to all six new lenses. They also kept the weather sealing.

The refreshed EF 300 2.8 IS II USM has been beaten and starved to 82.9 ounces for decreased reliance on mono and tripods. It’s also been given adamantium bones… read more