Interfit S1a 500Ws HSS TTL AC Powered Monolight

Interfit S1a 500Ws HSS TTL AC Powered Monolight

Interfit S1a 500Ws HSS TTL AC Powered Monolight

Interfit S1a 500Ws HSS TTL AC Powered Monolight

Interfit S1a 500Ws HSS TTL AC Powered Monolight ttvtyfzucf

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Product Highlights

  • Optional Transmitter for Canon/Nikon TTL
  • AC Power
  • 300' Wireless Range
  • High-Speed Sync to 1/8000 Sec
  • 3-Sec. Recycling to Full Power
  • LED Modeling Lamp
  • 7-Stop Power Range
  • 5700K Color Temperature
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You Pay: $499.99

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Interfit S1a overview

  • 1Description

Interfit joins the wave of manufacturers producing studio-quality TTL flash heads with the introduction of the S1a 500Ws HSS TTL AC Powered Monolight.

The S1a has 3 shooting modes: Wireless TTL for Canon or Nikon, Manual Mode, and High-Speed Sync. Wireless requires purchase of a Nikon or Canon 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 7.8 to 500Ws across a 7-stop range. If you want to fine tune your exposure, there's +/- 3 stops exposure compensation adjustable in 1/3 stops, and you can do it all at distances up to 328' thanks to the S1a's built in radio receiver.

Traditional manual mode is also 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 4 power levels (from 62.5 to 500Ws) to allow you to access sync speeds as short as 1/8,000. 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 S1a 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 1/9000 sec. for the ultimate in stop-action while still maintaining a steady 5700K color temperature. The S1a includes a 7" Bowens S-Type reflector, AC power adapter and a mini USB cable for firmware upgrades.

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.
S1a TTL Remote
The S1a'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 and Nikon cameras and supports E-TTL II and i-TTL protocols. 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
The S1a ships with an AC power pack (adapter). This multi-voltage (100-240VAC) adapter can be used anywhere in the world.
Shooting Modes
The S1 has three different shooting modes, each to serve a different purpose and shooting style. Interfit's S1 Remote for Canon or Nikon enables photographers to take advantage of their camera's TTL system just like they would with a speedlight. This automated light output uses the S1a's entire 7 stop power range (500 - 7.8Ws), automatically calculating the light in 1/10th stop increments and allowing for +/- 3 stops of exposure compensation
Manual Mode and High-Speed Sync
For those that prefer to have complete control over their light and have time for fine-tuned adjustments, the S1a can be used in the traditional manual mode. Manual shooting mode also utilizes the entire 7-stop power range, controllable in 1/10th stop increments. While in manual mode, users gain access to the S1a's High Speed Sync mode, reaching shutter speeds up to 1/8000th of a second. High-Speed Sync mode utilizes the top 4 stops in the power range (500Ws - 62.5Ws) and is manually adjustable in 1/3 stop increments
Utilizing IGBT technology, the S1a is able to offer short flash durations while maintaining color accuracy throughout the power range. Flash duration ranges from 1/1000 at full power, down to 1/9000 at minimum power. While shortening the flash durations, Interfit was also able to improve color accuracy, giving the S1a a consistent 5700K (+/-100K) color temperature throughout the entire power range
In the Box
Interfit S1a 500Ws HSS TTL AC Powered Monolight
  • Bowens S-Type Reflector
  • Power Cable 13'
  • Mini USB Cable
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Interfit S1a specs

    Maximum Watt/Seconds 500 Ws
    Wireless Range 300' (100 m)
    Guide Number 160' (48.7 m) @ 9.8' (3.0 m), 100 ISO
    Flash Variability 7.0 Stops (2.0 to 8.0) in 1/10 stop increments
    Recycle Time Maximum: 3.0 sec.
    Flash Duration 1/1000 - 1/9000 sec. min/max power
    Color Temperature 5700 K +/-100 K
    Modeling Light 10 W LED
    Modeling Light Control Off, 50%, 100%
    Flash Sync Normal: 1/250 sec.
    High Speed Sync: 1/8000 sec.
    Wireless Remote Built-in receiver
    Optional Interfit TTL-Canon/Nikon 2.4 GHz Remote
    Triggering Wireless remote, sync cord, IR/optical
    Operating Voltage 110-120 VAC
    Fan Cooled Yes
    Auto Dump Yes
    Dimensions Length x Diameter:
    With Dome and Handle: 12.6 x 5.1 (32 x 13 cm)
    Weight 4.9 lb (2.25 kg)
    Packaging Info
    Package Weight 9.65 lb
    Box Dimensions (LxWxH) 18.1 x 11.3 x 10.2"

    Interfit S1a reviews

    S1a 500Ws HSS TTL AC Powered Monolight is rated 5.0 out of 5 by 3.
    Rated 5 out of 5 by from Great complement to my S1 ! I have two S1's that I take out on location shoots and they're great! I needed one more light for my studio and didn't want to pay extra for another S1 with a battery. The staff at B&H recommended this light. I love it! It works perfectly with my S1! I did need a firmware update to get it to work with my 5DIV and other S1's, but that's no big deal for me. I will buy another one soon!
    Date published: 2017-04-25
    Rated 5 out of 5 by from Feature packed at a great price Well built, and feature packed for the price. Do yourself a favor and invest in the remote as most of the features can't be controlled without it. One of mine arrived stuck in HSS mode. Once I got the remote, I could turn it off. The lights look great, 500ws is more than enough for my indoor shots I take. I actually wish the lights could be turned down lower than they're minimum, as it's tough to shoot with aperture wide open BUT they do have HSS, so you can use that if it's too washed out. I opted to save a couple hundred and get it without the battery. I wish I would've gotten the battery, as moving it around with a battery would be awesome! Outside, etc. It's one of the few monolights on the market with A.C. and battery power and it's silly to buy it without that feature. Altho, I did get 3 without for the price of 2 with batteries. If you know you will NEVER move them, then you can Save, but I wish I would've opted for the flexibility. This was my first monolight purchase, and I learned quickly that if I had the battery option, I would use it.
    Date published: 2017-07-28
    Rated 5 out of 5 by from Great studio light I’m using two of these lights in cell mode as a background light or rim lights to work with my Profoto D2. There easy to setup/adjust as needed.
    Date published: 2018-02-16
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