The 120JTTL is the first parabolic reflector flash that offers through-the-lens flash dedication capability with today's most popular 35mm and medium format cameras. Able to accept the complete line of Sunpak dedicated modules, the 120JTTL is extremely compact, lightweight and extremely easy to operate, yet it produces an impressive guide number of 45/150 (m/ft) with ISO 100 film. Both tilt and swivel movements are provided. When combined with the optional EXT-10 Cord, it permits the 120JTTL to be used off-camera, yet still maintain complete dedicated flash capability.
In addition to being powered by the high voltage TR-PAKIIa NiCd power pack, which provides 200 full-power flashes at an impressive recycle rate of 1.5 seconds, other power sources are also available, including an AC adapter. The 120J TTL can even operate with just 4 AA batteries installed, when greater capacity or faster recycling are not needed.
When TTL flash dedication is either not available or desired, the 120JTTL and its identical non-TTL version the 120J Auto, both offer 3 aperture settings, plus manual adjustment (full, 1/2, 1/4, 1/8, 1/16 power) for total creative control. The parabolic reflector can be positioned for normal and wide angle use, or removed for bare bulb lighting that creates a uniquely natural lighting effect.