The SB-29s was the last of the old ring-style flash units for macro photography. It does not support DSLRs except in Manual flash mode.
Guide Number (ISO 100 FX): 36 ft, 11m @ 20mm
Weight: 14.5 ounces (410g)
Power: 4 AA batteries
Recycle Time (alkaline): 3 seconds
Max Flash Duration: 1/1400
Coverage: 20mm
35mm film TTL support: Yes
D-TTL support: No
i-TTL (CLS) support: No
Auto Aperture: No
Automatic Flash mode: No
Manual Flash mode: Yes (3 levels)
Head tilt: No
Head rotate: No
AF Assist: Yes
High Speed Sync: No
Repeating Flash: No
Modeling Light: Yes
PC Sync Socket: Yes
LCD: No
Foot style: Twist lock
Flash Value lock: No
Flash Color info: No
Wireless: No
Other: Macro flash, individual tube setting