Nikon makes only a handful of flash units that are compatible with current Nikon DSLRs. The current models are:
- SB-300 — low power, simple i-TTL flash
- SB-500 — low power, simple i-TTL/Manual flash
- SB-R200 — independent i-TTL flash units designed for macro use
- SB-700 — modest power i-TTL flash with quite a few additional features
- SB-910 — highest power i-TTL flash that serves as both three group optical commander/remote
- SB-5000 — highest power i-TTL flash, first to provide six group radio wireless remote
- SU-800 — an optical flash commander only
Note that all Nikon DSLRs starting with the D2h (D200 and D80 in consumer models) use a technology called i-TTL and also referred to as CLS. The above Speedlight models are the only ones that "speak" this dialect, and thus the only Nikon flashes that are fully compatible with recent Nikon DSLRs. For older Nikon DSLRs (D1 series, D100) and for film cameras other than the F6 see the section on Older Nikon Flashes.
In 2016 Nikon introduced a new technology to CLS: radio-frequency wireless flash capability. The SB-5000 is the only flash that currently supports this, and the D5 and D5000 the only cameras that support the radio-frequency method of communicating (may require WR-R10 transceiver if no flash mounted on camera).