It’s hard to be sure of the details on this new lens from Sigma, since they announced that there is a delay (it will not be available this month – in March 2013). The only useful thing I would like to point to the significant items in the spec list:
- Dust-proof and splash-proof construction
- High image quality close to fixed focal length lens
- Focus limiter button (to speed AF up)
Sigma also disclosed that they want this lens to be the first in a long (and new) line of “sports-oriented” lenses (read: lens line of big focal lengths, and possibly relatively inexpensive… for long lenses).
So, we will have to wait until we can see if these features are accompanied with excellent optical quality (or not) for this Sigma new 120-300mm f/2.8 DG OS HSM lens.