User manual
Interfit S1 AC DC 2-Light TTL

User Manual for Interfit S1 AC DC 2-Light TTL Pro Flash Kit for Nikon

• Product category: Monolights Interfit
• Brand: Interfit
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Interfit Monolights

Product description

• 2 x Interfit S1 500Ws HSS TTL Battery-Powered Monolight
  • Interfit S1 Product Overview
  With the introduction of the S1 500Ws HSS TTL Battery-Powered Monolight, Interfit joins the small group of manufacturers producing TTL monolights. The flash head is powered by an internal, removable 4500mAh lithium-ion battery that fits inside the head's housing. It has a 350 full-power flash capacity and can also run on AC while your battery is charging. It's controllable wirelessly at distances up to 328'.The S1 has 3 shooting modes: Wireless TTL for Canon, Nikon, or Sony; Manual Mode; and High-Speed Sync. Wireless requires purchase of a Nikon, Canon or Sony dedicated transmitter, but once that's done, you can basically treat these studio strobe units as you would your on-camera flash. In TTL, the camera's flash technology takes stock of the scene and automatically adjusts the power from 1.9 to 500Ws across a 9-stop range. If you want to fine tune your exposure, there's +/- 3 stops exposure compensation adjustable in 1/3 stops.Traditional manual mode is available for those who want complete control. Manual mode is also how you access HSS (High-Speed Sync). This mode uses the flash's top 3 power levels (from 125 to 500Ws) to allow you to access sync speeds as short as 1/8000. HSS presents a new world of exposure possibilities whether you're trying to overpower the sun, control the background's brightness, or use wider apertures.The S1 recycles to full power in 3 seconds and a fraction of that time at reduced power levels. Thanks to the incorporation of IGBT technology, the flash can also reach flash durations as short as 1/11,000 sec for the ultimate in stop-action while still maintaining a steady 5700K color temperature.The S1 ships as a complete system including a 350-shot Li-ion battery with a charger that powers it up in about 3 hours. Since the S1 is AC/DC, it can also be plugged into a wall outlet for use regardless of its voltage while the battery is charging. The S1 also includes a 7" Bowens S-Type reflector, an AD adapter and a mini USB cable.
  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
• Interfit S1 TTL Remote for Nikon
  • Interfit S1 Product Overview
  Dedicated to the Interfit S1-series of monolights, this S1 TTL Remote permits wireless TTL control over the light when working with Nikon cameras. It supports the Nikon i-TTL protocol and permits working with three distinct groups (A,B, and C) for creative flexibility and greater control over lighting ratios. The remote is designed to be mounted via the camera's hot shoe and enables control over the S1 monolights from up to 300' away. Users will appreciate features such as control of audible recycle beep and LED modeling lamp, and sync speeds up to 1/8000 second.
  Firmware Requirements
  • May require updating the firmware of your S1 light
  Power Adjustments
  • Allows for precise power adjustment in Manual, TTL and High-Speed Sync modes
• 2 x Impact Air-Cushioned Light Stand (Black, 10')
  • Interfit S1 Product Overview
  This Impact Air-Cushioned Light Stand is a black anodized aluminum support that rises to a height of 10' and folds down to 33.5" for storage and transport. The stand will handle up to 8.5 lb and is topped with a 5/8" stud with 1/4"-20 threads. It has a wide footprint of 38" for greater stability. Air cushioning gently lowers the light when making height adjustments to protect equipment and fingers.
  Air-Cushioned
  • Protects equipment and fingers from damage
  Compact Design
  • Will fit easily into most location cases
  Accepts Casters
  • For easy positioning of lights
  UPC: 847628030626
• Impact Luxbanx Medium Strip Softbox (16 x 55")
  • Interfit S1 Product Overview
  The Luxbanx Medium Strip Softbox from Impact is a light shaper with a high degree of directional control thanks to its long narrow form factor. Designed to illuminate a "strip" of the subject as compared to other modifiers, this 16x55" size softbox is ideal for fitting into tight spaces with low ceilings. It's often used to photograph large products or in full length portraiture to edge light the subject, and it's a good choice for hairlighting large groups and lighting cycs and backgrounds. This size is also often used to provide highlights in car and motorcycle photography. This Luxbanx softbox features a soft white interior, removable front diffuser and removable inner baffle. The diffuser and baffle can be used together for maximum softening of the output. Removing the inner baffle will give you a more crisp light quality with higher contrast, while shedding the front and inner diffusers turns the Luxbanx into a large reflector with maximum brightness and contrast. The versatile Luxbanx has an additional control via the optional fabric grid which mounts to the recessed lip of the softbox with touch-fasteners. The grid narrows and concentrates the light's beam forward, controlling spill and adding directional control to the Luxbanx's attributes. The long, narrow shape of the softbox makes it ideal for side-lighting in portraiture, accenting cars and bikes and photographing glassware and other reflective objects. Every Luxbanx comes with a carrying case and a spare Flex Rod. Separate purchase of a speed ring that matches your strobe's mount is required for use. Impact makes models to fit most popular brands. UPC: 847628561953
• Impact Luxbanx Small Octagonal Softbox (36")
  • Interfit S1 Product Overview
  The Luxbanx Small Octagonal Softbox from Impact is a highly versatile tool for strobes, LEDs, and fluorescents. This 36" diameter softbox is large enough to exhibit the wrap-around light quality that this octagonal shape is known for, yet small enough to use in tight spaces. The softbox features a soft white interior, removable front diffuser and removable inner baffle. The diffuser and baffle can be used together for maximum softening of the output. Removing the inner baffle will give you a more crisp light quality with higher contrast, while shedding the front and inner diffusers turns the Luxbanx into a large reflector with maximum brightness and contrast. The octa Luxbanx has an additional control via the optional fabric grid which mounts to the recessed lip of the softbox with touch-fasteners. The grid narrows and concentrates the light's beam forward, controlling spill and adding directional control to the Luxbanx's attributes. The large surface area of this octagonal-shaped softbox gives you a unique wrap-around quality of light that gains emphasis as you move it closer. Catchlights in the eyes of your subject are round and natural. Every Luxbanx comes with a carrying case and a spare Flex Rod. Separate purchase of a speed ring that matches your strobe's mount is required for use. Impact makes models to fit most popular brands. UPC: 847628564442
• 2 x Impact Speed Ring for Impact, Bowens S, Westcott & Aputure
  • Interfit S1 Product Overview
  The Speed Ring for Impact, Bowens S, Westcott & Aputure from Impact features indexed flex rod holes that allow you to effortlessly mount any square, rectangular, strip, or octagonal Luxbanx softbox to Impact, Bowens S, Westcott, and Aputure heads. The ring will also fit most other brands of softbox. The sturdy all-metal ring rotates 360 degrees to facilitate orientation or to clear obstacles in tight quarters. It has 3/8"-16 taps on two sides to allow mounting directly to grip gear such as Impact's Swivel Umbrella Adapter, 3 Section Double Articulated Arm, Super Clamp, and more. UPC: 847628003309
• Impact Light Kit Bag #2 (34 x 13.5 x 12")
  • Interfit S1 Product Overview
  The black Light Kit Bag #2 (34 x 13.5 x 12") from Impact makes transporting your lighting kit easy and secure. The bag is designed to hold three monolights along with their reflectors (such as Impact VC500LR), four stands, boom, umbrellas, cables and other support gear but can also be used to hold other lighting equipment instead. You'll have plenty of room to take along enough lighting gear for a portrait session - all packed in an organized and accessible way. A touch fastened divider tray separates the stands, boom and umbrellas from the lights preventing them from bumping together and causing scratches or damage. For additional smaller equipment such as cables and small accessories, there are three interior 10.5 x 8.0" zippered mesh pockets.The bag is made from soft, padded water-resistant nylon and contains six movable touch fastened interior dividers (6 large, 2 small) that will permit you to configure the bag to accommodate the gear you need that day. The Light Kit Bag is carried by its two 2" wide overlapping top carry handles that can easily be extended into dual shoulder straps. The contents are accessed via dual zippers that when placed together will accept a user-supplied lock. For even more protection, the bottom of the bag contains three rubber feet for when the bag is placed on the ground. And the bag folds down to a quarter of its height for convenient storage and easy setup. Whether for storage or transport, the Impact Light Kit Bag will serve both pro or amateur well.
  • The soft padded carry case is designed to hold three monolights with reflectors, four light stands, umbrellas, cables and other accessories
  • The interior has six movable, touch fastened dividers that permit you to configure the bag to suit your needs; dividers consist of six large and two smaller styles
  • 2" (5.1 cm) wide overlapping dual carry handles that convert to a shoulder strap
  • Interior has three zippered 10.5 x 8.0" mesh pockets (26.7 x 20.3 cm)
  • Touch fastened protective nylon tray separates light stands and umbrellas from monolights
  • Water-resistant padded nylon construction
  • Folds down to less then 4" for convenient storage and easy setup
  • Dual zippered opening; accepts user-supplied lock
  UPC: 847628030619

• 2 x S1 500Ws HSS TTL Battery-Powered Monolight vfbfrwrtwttuzvtfycuxftsd
• Bowens S-Type Reflector
• Battery for S1 Monolight
• Battery Charger For S1 Monolight
• AC Power Pack For S1 Monolight
• Limited 1-Year Warranty

• S1 TTL Remote for Nikon

• 2 x Impact - Air-Cushioned Light Stand (Black, 10')

• Impact - Luxbanx Medium Strip Softbox (16 x 55")

• Impact - Luxbanx Small Octagonal Softbox (36")

• 2 x Impact - Speed Ring for Impact, Bowens S, Westcott & Aputure

• Impact - Light Kit Bag #2 (34 x 13.5 x 12")

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Technical parameters

• 2 x Interfit S1 500Ws HSS TTL Battery-Powered Monolight

  Maximum Power	500 Ws
  Power Control	9 Stops in 1/10-Stop Increments
  Guide Number	160' / 48.7 m at 9.8' / 3 m, ISO100
  Flash Duration	1/11,000 to 1/500 Sec
  Recycle Time	3 Sec (Full Power)
  Color Temperature	5700K ± 100K
  Accessory Fitting Type	Bowens S Type

  Type	LED
  Wattage	10 W
  Control Modes	Full On, Off

  Sync Type	Cable, Infrared, Optical, Radio
  Sync Speed	1/1/250 Sec 1/1/8000 Sec (High-Speed)
  Wireless Frequency Bands	2.4 GHz
  Wireless Range	328' / 100 m (Radio)

  AC Input Voltage	100to240 VAC, 50 / 60 Hz

  Battery Chemistry	Lithium-Ion
  Capacity (mAh)	4500 mAh
  Flashes Per Charge	350 Flashes (Full Power)
  Recharge Time	3 Hours

  Display	None
  Auto Dump	Yes
  Fan Cooled	Yes
  Dimensions	Rating 90% users recommend this product to others. And what about you? This product has already been rated by 40 owners. Add your rating and experience with the product. Discussion Ask our technicians if you have a problem with your settings, or if anything is unclear in the user manual you have downloaded. You can make use of our moderated discussion. The discussion is public and helps other users of our website who may be encountering similar problems. The discussion is empty - enter the first post Post a new topic / query / comment: Items marked with * are required. Your name *: E-mail : Subject *: Message *: Your email address will not be displayed. Do not forget to fill it in if you want to receive a reply to your enquiry/contribution. Processing of personal data in accordance with GDPR