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 ?
F4 is pretty fast and there are fast telephoto lenses like the 600mm f4. They cost an arm and leg but professional photographers rent them, or their work pays for them.
During the day there is a lot of light. At f4 during the day at ISO 400 shooting at 1/200th of a second is possible.
Noise also seems to be a bogey man with people complaining about noise even at ISO 100 at times which I think is confusion over what ISO related noise is.
Once you take a 20mp+ and either resize for web or print it most noise is not visible to anyone but pixel peeping photographers even at IS 3200 or higher as long as the image was properly exposed.
Lastly with modern AI denoising tools even very high ISO images can look very clean.
Let me know if you want some real world examples of ISO 3200+ images that I think look very clean when resized for web at sizes larger than IG allows.