Some Sony DSC-QX30 owners who bought it considered that it had a good lens. Ephotozine.com said on expert website Ephotozine “The Sony Cyber-shot QX30 is one of Sony's "Smart Lens" cameras, designed to be used with a smartphone” but they only gave it a rating of 60 out of 100. Ephotozine.com also wrote “It gives you an impressive 30x optical zoom lens, vastly improving the reach of your camera”. Two years ago Techradar.com wrote on Techradar “It looks like a giant add-on lens for your smartphone.” in their review.
A few customers who reviewed it wrote that it had a good zoom. One customer said in their reviews that it had a good autofocus. Katia gave the Sony DSC-QX30 a rating of 5 stars and she said in her Sony DSC-QX30 review on Amazon “The focus is fast”.