Via: http://www.ricoh-imaging.co.jp/japan/products/q7/lenses/index.html
In short, the following are the specs:
- 3.8-5.9mm, 35mm equivalent on Q7 is 17.5-27mm
- Maximum apertures from F3.7 to F4
- 3 glass-molded aspherical elements
- 38mm in length and 75g in weight