Of the 18 elements in six moving groups, four are aspherical lens elements and 11 are elements made from glasses with anomalous partial dispersion for the correction of chromatic aberrations. Only one very light element is moved for focusing. Very fast, almost-silent, precise focusing is enabled by a specially developed drive concept comprising a stepping motor and linear positioning. This means that the overall length of the lens does not change during focusing.”
Essentially it's a near flawless zoom lens that covers the full range of focal lengths I would normally use on just about any job. The lens also has built-in image stabilization which is great on bodies like the first generation of Leica SL cameras and my little Sigma fp, both of which are bereft of in-body image stabilization. The lens adds its own. It's also highly weather resistant as is the Leica SL2 body.
It was the perfect combination of tools for a challenging environment. Those, and a really good hat.
Dang sharp...even wide open.... although the chances of using it outdoors at f2.8 were ... limited. As in "none."
Do I still like and use the Leica 24-90mm f2.8-4.0 Aspheric? On just about every commercial job I've undertaken since I bought the lens five years ago. It's big and heavy but it makes up for those drawbacks by being the best performing zoom, optically, that I have ever used. And that's cool.
The lens is still in the current line up from Leica. When I bought mine, new, it was just over $4800 USD. The current price for a new one is a little over $6300. Amazing.