Came across this on Canon Australia's website.
- Standard zoom lens 24-105mm, fast f/4 aperture
- Super UD glass lens with two types of aspherical elements which effectively correct aberration
- Image Stabilizer gives equivalent effective shutter speed three stops faster during hand-held use
- Optimised lens coating to minimise ghosting and flare
- High dust and moisture resistance
- Closest focus distance of 45cm at all zoom focal lengths
- Circular aperture producing attractive bokeh
- Inner focusing, ring USM and new AF algorithms for fast and quiet autofocusing
- Manual focusing enabled even during AF mode (full-time mechanical manual focus)
- Only environmentally friendly lead-free glass used in lens construction
Now this could be the lens I've been waiting for.
It will deffinately fill the gap between the 17-35 and the 100-400, and its only another 670g in the kit bag.
It will be interesting to see what the price will be when it arrives on these shores.