Complex sentence: As of 2009, there are no photographic zoom lenses beyond about 3 × with imaging quality on par with prime lenses, and constant fast aperture zooms (usually 2.8 or 2.0) are typically restricted to this zoom range.
Split into simpler sentences: As of 2009, photographic zoom lenses beyond about 3 × cannot generally produce imaging quality on par with prime lenses. Constant fast aperture zooms (usually 2.8 or 2.0) are typically restricted to this zoom range.