Better clarify that with “fastest lens” possible.
Look for “F Stop” numbers like “F 1.8” or “F 2.0” which will be written on the lens.
That’s the maximum aperture “speed” versus shutter speed.
The -smaller- the number, the “faster” the lens which means better performance in low light situations with a trade off of depth of field.
That’s correct.
I thought Doogle wanted a compact camera, where these details are not as easily available, unlike lens diameter and megapixels.