The SB-28DX was the first of the "digital" flash units from Nikon, introduced with the Nikon D1 models, and basically a quick update to the SB-28 flash to support DSLRs. Note that the SB-28DX is D-TTL, not i-TTL, so it only works with older DSLRs.
Guide Number (ISO 100 FX): 105 ft, 32m @ 28mm
Weight: 11.8 ounces (335g)
Power: 4 AA batteries, external
Recycle Time (alkaline): 6.5 seconds
Max Flash Duration: 1/830
Lens Coverage: 18mm, 20mm, 24mm, 28mm, 35mm, 50mm, 70mm, 85mm
35mm film TTL support: Yes
D-TTL DSLR support: Yes
i-TTL (CLS) DSLR support: No
Auto Aperture support: Yes
Automatic Flash mode: Yes
Manual Flash mode: Yes (7 levels)
Head Tilt: Yes
Head Rotate: Yes
AF Assist: Yes
High Speed Sync: Yes, Manual only
Repeating Flash: Yes
Modeling Light: No
PC Sync socket: Yes
LCD: Yes
Foot style: Twist lock
Flash Value lock: No
Flash Color info: No
Wireless CLS: No
