I took a photo of the dog against a bright background using the Leica SL2-S with the Sigma 24-70 f/2.8. The sigma is a fine lens, but it (literally) pales in comparison with the native Leica primes. Alice was lacking in contrast and sharpness due to the slight flaring and CA that occurs with the Sigma. I've taken nearly identical photos with the APO Summicron-SL 35mm and they were bright, sharp, and contrasty. I miss that lens.