Since lens with high focal distance are generally not that fast and they need high shutter to freeze moving animals, how do they get light without addind too much gain an grain ?
Since lens with high focal distance are generally not that fast and they need high shutter to freeze moving animals, how do they get light without addind too much gain an grain ?
The wildlife photographers I know will use whatever iso is required to get the photo. Better to have some noise in the photo then no photo. You can also clean the noise up in post.
Modern cameras are ISO invariant. The better advice is to shoot underexposed.