Shaggy2070
Well-known member
I'm pretty new to DSLR photography and was wondering about fast lenses.
If you had two cameras of the same model and settings (Aperture Priority, Iso 200 for eg.) and one camera had a 400mm f2.8 and the other had a 400mm f5.6 lens. The f2.8 is classed as a fast lens so if it was stopped down to f5.6 would the shutter speed be faster than the standard f5.6 or would they get the same shutter speed???
If you had two cameras of the same model and settings (Aperture Priority, Iso 200 for eg.) and one camera had a 400mm f2.8 and the other had a 400mm f5.6 lens. The f2.8 is classed as a fast lens so if it was stopped down to f5.6 would the shutter speed be faster than the standard f5.6 or would they get the same shutter speed???