ProMaster 170SL Flash for Nikon

The ProMaster 170SL Speedlight works with your camera to add light where you want it. It automatically adjusts its exposure and light beam to match your camera and lens settings. The articulating head can be adjusted for a variety of swivel and bounce positions; and is compatible with many light modifiers. The 170SL's powerful guide number of 52 (meters) combined with 180mm zoom head can illuminate subjects from afar. The built-in wireless TTL system provides expanded off-camera lighting options (functions as a master of slave).

Key Features:
Druable tilt & swivel head.
Quick release locking foot.
Quality buttons and switches tactile response & durability.
High grade zoom motors and capacitors.
Custom built PCB.
Cusom designed 2-lens flash head for best quality.

Specifications:

Durable H.Guide Number: (ISO 100) 52 m/ 170' at 180mm reflector position
Flash Coverage: 24-180mm (18mm with wide panel)
Auto/Manual Zoom
Bounce/Swivel Flash Head
Bounce Position (degrees): -7, 0, 45, 60, 75, 90
Swivel Position (degrees): Right 0-180, Left 0-90
Built-in wide panel (18mm) and bounce reflector
Flash Duration: 1/800-1/20,000 second
Color Temperature: 5600K
Exposure Compensation: /-3 EV
Master/Slave Mode: Optical pulse with 3 groups, 4 channels
Recycling Time: Alkaline cells 0.2-4.55; NiMH cells 0.15-2.5 seconds
Net Weight: 14 oz/396 g (without batteries)
Dimensions: 7 3/4" x 3 1/16" x 2 5/16" (196.8mm x 77.8mm x 58.7mm)
Power Source: 4 x 1.5V AA alkaline batteries, 4 x 1.2V NiMH batteries, optional HV external power source