> The f/1.5 is an actual rating. You're not disagreeing with my actual argument, which is just "they should use the equivalent ratings for both focal length an

> The f/1.5 is an actual rating. You're not disagreeing with my actual argument, which is just "they should use the equivalent ratings for both focal length and f-stop". If you prefer physically-based specs, you should be demanding that they also say the focal length is 7mm or whatever. > It's important for shutter speeds, and relative performance in low light It's completely useless for determining low-light perf without knowing the crop factor. > I can compare roughly a phone camera that's at f/1.5 vs a phone camera that's at f/2 Not without knowing the crop factor. You're falling for the marketing.