Interfit has put together the S1 On-Location Portable 2-Light Backpack Kit to offer studio quality lighting on the road with or without AC power whether you're traveling by car or on foot. Two 500Ws S1 AC or battery-powered monolights are included. The S1 can be used in manual, HSS, or in wireless TTL up to 300' with the purchase of a Nikon, Canon, or Sony transmitter. The kit also includes 2 standard reflectors, 2 batteries with chargers, 2 multi-voltage AC power supplies, Micro USB cables, sync cables and an Interfit Backpack to carry it all.
Compatibility and Firmware Updates
In order to ensure maximum compatibility with your system, Interfit offers firmware updates for download on their website. These updates can be easily installed by the user by connecting the monolight to their computer over USB.
Complete Package
500Ws monolight with High-Speed Sync, TTL for Canon and Nikon, IGBT technology, lithium-ion battery, and multi-voltage AC power pack in one complete package
S1 TTL Remote
The S1's TTL remotes give the users direct control over any S1 light in any shooting mode from the camera position. This camera-mounted transmitter is available for both Canon, Nikon and Sony cameras. Having three individual groups gives users the freedom to control lights individually to create dynamic lighting ratios with a working range of up to 300' (100 m)
Power Supply
Each Interfit S1 comes standard with both battery and AC-power sources. The interchangeable 4500mAh Li-ion battery provides up to 350 full power flashes in Manual and TTL modes and over 400 full-power flashes in High-Speed Sync mode. This wire-free power source gives photographers the freedom and mobility to venture out from the studio and rapidly set up and reposition lights on location. For traditional studio work, the S1 also ships with an AC power pack (adapter). This multi-voltage (100-240V) adapter can be used anywhere in the world and lets photographers continue to shoot while their battery is charging
Shooting Modes
The S1 has three different shooting modes, each to serve a different purpose and shooting style. Interfit's S1 Remote for Canon, Nikon or Sony enables photographers to take advantage of their camera's TTL system just like they would with a speedlight. This automated light output uses the S1's entire 9-stop power range (500W - 1.9Ws), is automatically calculated in 1/10th stop increments, and allows for +/- 3 stops of exposure compensation
Manual Mode and High-Speed Sync
For those that prefer to have complete control of their light and have time for fine-tuned adjustments, the S1 can be used in the traditional manual mode. Manual shooting mode also utilizes the entire 9-stop power range, controllable in 1/10th stop increments. While in manual mode, users can access the S1's High Speed Sync mode, reaching shutter speeds up to 1/8000th of a second. High-Speed Sync mode utilizes the top 3 stops in the power range (500 - 125Ws) and is manually adjustable in 1/3-stop increments
IGBT
Utilizing IGBT technology, the S1 is able to offer short flash durations while maintaining color accuracy throughout the power range. Flash duration ranges from 1/500 at full power, to 1/11,000 at minimum power. While shortening the flash duration, Interfit was also able to improve color accuracy, giving the S1 a consistent 5700K (+/-100K) color temperature throughout the entire power range