Nikon SB28DX Speedlight electronic flash The SB-28DX is designed to provide fully dedicated TTL operation with the Nikon D1, D1H, D1X, and D100 SLR digital cameras The SB-28DX is also fully functional with film-based cameras like the N90s, F100, and F5. There are no advantages to using the SB-28DX instead of the SB-28 with film-based cameras.