Certainly not, unless the consumer lens is covered in mud or made from tinted glass! As for relative aperture adjusted for actual, measured light transmission,

Certainly not, unless the consumer lens is covered in mud or made from tinted glass! As for relative aperture adjusted for actual, measured light transmission, that's a T-stop, but these are typically only marked and specified for cine lenses, e.g., https://www.zeiss.com/consumer-products/int/cinematography/master-prime-lenses.html#data https://www.zeiss.com/consumer-products/int/cinematography/m... (IIRC, the Master Primes are geometrically f/1.2 at T1.3)