So a few months ago I picked up one of these brand new Interfit S1's, and wanted to give it a spin to see how well it held up. These were brand new to the market, and STILL haven't really been reviewed online, so I figured I'd make something applicable to most photographers, instead of just specs.
Check out the video:
Here's the link to Interfit's site:
Since there will obviously be a ton of people wanting the specs of each unit to compare the two, here ya go. Pulled from B&H:
Maximum Watt/Seconds: 500W/s +/- 1/20 Stop
Flash Variability: In 1/10 or 1 Stop increments 9.0 Stops:
2.0-10 power level (1/256-1/1)
Recycle TimeMinimum/Maximum: 0.1-1.9 sec.
Quick Burst Mode: 20 frames per sec.
Flash Duration: Normal mode (t0.5): 1/11,000 - 1/1,000 sec. min/max power
Freeze mode (0.05): 1/19,000 - 1/1,000 sec. min/max power
Color Temperature: 5,600K
Modeling Light Control: Off / Proportional / Free (full) 5.0-100%
Max Sync Speed: Up to 1/250 sec. in normal mode
Up to 1/8,000 sec. in High Speed mode (requires free firmware update)
Wireless Remote: Yes, via optional Air Remote TTL-C/N, Air remote, Air USB (Profoto Studio) Wireless range:
Up to 1,000' (300 m) for normal triggering
Up to 330' (100 m) for TTL with optional Air Remote TTL-C
Frequency Band: 2.4 GHz
Triggering: Air radio slaves, optical (IR), sync cord
Operating Voltage: 100-240 VAC, 50/60 Hz, Self-sensing
14.8 VDC/3 Ah via included, rechargeable battery
Battery Type: Lithium-ion
220 Full power flashes Battery life: 300 charge cycles (to 80% left)
Battery Charge Time: 2.0 Hours with included 2.8V multi-voltage charger
Fan Cooled: Yes
Auto Dump: Yes
Auto Power Off: Yes, after 60 minutes of disuse
Sleep mode after 30 minutes of disuse
Flash Ready Indicator: Beep tone, ready right, modeling light dimming
Battery Charge Display: Green LED indicators: 3 Sections: 100-70%
2 Sections: 70-40%
1 Section: 40-10%
1 Section blinking
Circuit Protection: Adaptive thermal control
Operating Temperature: 14 to +122°F (-10 to +50°C)
Storage: 4 to +140°F (-20 to +60°C)
Dimensions: Length x diameter:
Body only: 12.2 x 5.12 (310 x 130 mm)
With 5/8" (16 mm) stand adapter: 12.2 x 6.69" (310 x 170 mm)
Weight6.61 lb (3.0 kg) Including battery
Maximum Watt/Seconds: 500Ws
Wireless Range: 300' (100 m)
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: 10W LED
Modeling Light Control: Off, 50%, 100%
Flash SyncNormal: 1/250 sec.
High-Speed Sync: 1/8,000 sec.
Wireless Remote: Built-in Receiver
Optional Interfit TTL-Canon/Nikon 2.4 GHz Remote
TriggeringWireless remote, sync cord, IR/optical
Operating Voltage: 100-240 VAC, 50/60 Hz
Battery Type: 4500 mAh lithium-ion
350 full-power flashes in Manual mode
400 full-power flashes in HSS mode
Battery Charge Time: 3.0 hours with included multi-voltage charger
Fan Cooled: Yes
Auto Dump: Yes
Dimensions: Length x Diameter:
With Dome and Handle: 13.4 x 5.1 (34 x 13 cm)
Weight6.3 lb (2.85 kg) including battery
Now that the tech specs and mumbo jumbo is over....here is where the application comes in.
I have been using the S1 as my main light for the past few months, and it has been a staple so far for my camera gear bag. The light is beautiful (I know a modifier has an influence on this). I still can't get over how portable a strobe can be without having battery packs...but nonetheless...it's still good with that feature aside. I usually shoot with just one light, and maybe a few extra's for a rim light, or to emphasize some ambience. So when I pack my camera bags for an assignment, I have been using this thing non stop as my main choice.
I have a few different light modifiers I have been using with the S1. The main 3 are these:
I choose these three main umbrellas simply because of the portability of each (the same reason I picked this strobe). Each of these easily fold up or fit into the suitcases I travel with. I'm also not usually shooting more than 2 people per image when I shoot, so something this size is perfect for my needs. I also bring with me the zoom reflector that comes with the unit, but I personally don't ever use it, or have the need for it, unless I just want to use the unit as a strong backlight.
I personally really like using the beauty dish for its simplicity of a portable unit. It's 500w that you can hand-hold and walk around with. When I use the dish, I use the diffusion sock to soften the light a little more, and it's just as soft as the other two modifiers...just with a much bigger spread.
Here's a selection of images I've made over the past few months with the Interfit S1:
Here's the link again to their site:
Hope this sheds a little more light on this new strobe. I think its worth it.
I was recently shipped out a new remote for the strobe that has some updates that extend the battery life significantly. There has also been a firmware update that allows you to use TTL within the HSS, and more camera compatibilities.