The STF-8 Twin Flash is the world's first weatherproof macro flash system, specially designed for capturing macro images in all types of conditions. With its compact and lightweight design, you can easily capture properly illuminated macro shots in any environment, even in the rain.
SMALL SIZE. MAXIMUM CONTROL.
The STF-8 offers unparalleled macro lighting control. In addition to full TTL auto-sync, you can manually choose the output power, from full all the way down to 1/128. The flash ratio between the left and right heads is also fully adjustable from 1:8 to 8:1, so you’ll never feel limited in your ability to control highlights and shadows across your subject. The heads are removable: position one to light your subject, the other to light the background, or any combination you choose depending on the shooting scenario. This can be especially useful for wide-angle macro photography.
Use both flashes for a guide number of 8.5 or one flash for a guide number of 6. Or, for softer lighting, simply rotate the built-in diffusers in front of the flash heads.
DUST AND SPLASHPROOF CONSTRUCTIONS
The STF-8 boasts dust, splash and freezeproof construction that perfectly complements weatherproof OM-D camera bodies and compatible M.Zuiko lenses, enabling you to illuminate your macro subject in the harshest of conditions.
MULTIPLE FLASHES, NO WIRES
With Olympus’ RC (remote control) system, you have access to a variety of wireless flash options. Use the STF-8 as a master flash to trigger additional RC compatible flash units, as a slave in one of four independently controlled groups. Perfectly light your macro subject with the STF-8 while using additional RC compatible Olympus flash units to illuminate the background.
Four available channels mean the RC Mode is resistant to interference from other photographers, so you can comfortably shoot events when other photographers are nearby.
ADJUSTABLE FLASH HEADS
The angle of the flash heads can be adjusted in a range of 60° upward to 40° downward, and the position of the flash heads along the ring adapter can be adjusted as well. Arrange the flashes to create shadows and achieve your desired level of depth in your photos.
COMPATIBLE WITH ADVANCED FEATURES
The STF-8 Twin Flash is compatible with advanced features like Focus Stacking* and Focus Bracketing**, available on select OM-D and PEN camera bodies. Now you can easily create stunning, perfectly lit macro shots with incredible depth-of-field!
* Focus Stacking available with OM-D E-M1 and E-M1 Mark II camera bodies using M.Zuiko Digital ED 12-40mm F2.8 PRO, 60mm F2.8 Macro, and 30mm F3.5 Macro lenses.
** Focus Bracketing available with OM-D E-M1, E-M1 Mark II, E-M5 Mark II, and E-M10 Mark II camera bodies.
Clip-on type TTL auto sync macro flash
Olympus wireless remote control flash system compatible (Commander function only)
One flash: 6.0 (ISO 100•m),
Two flashes: 8.5 (ISO 100•m)
Vertical: approx. 61 degree, horizontal: approx.72 degree (flash head short side, long side/one flash, covers the angle of view of a 12mm (35mm equivalent: 24mm))
Left-right Light Intensity Ratio
One head firing / Two heads firing (1:8 to 1:1 to 8:1)
Can be set using dial on flash
Remote Control (RC)
Flash mode: RC
Group: 4 groups, independently controlled (3 slaves, 1 camera flash)
RC Commander function only
Flash Head Movement Angle
Up/down facing: front 0°, upward facing 0° - 60°, downward facing 0° - 40°
Can be slid on adapter ring
1/1000 sec. or less
Charging display (orange), power display (green)
Power Supply Batteries / Recommended Batteries
AA alkaline batteries: 4
AA NiMH batteries: 4
Can be set on the camera
Full (1/1) to 1/128 (Can be set on flash / camera)
Charging Time 
Approx. 4 sec. (when using AA alkaline batteries)
Approx. 4 sec. (when using AA NiMH batteries)
Flash Emission Count 
Approx. 480 times (when using AA alkaline batteries)
Approx. 1330 times (when using AA NiMH batteries)
Operating Environment 
-10 to 40°C
Controller: W 66.9 mm x H 59.1 mm x D 68.5 mm (excl. protrusions)
Flash: W 45.4 mm x H 39.7 mm x D 42.3 mm (excl. protrusions)
283 g (incl. Controller, flashes and cords, excl. Ring adapter, joints and batteries)
Flash case, Two diffusers, ring adapters (φ46mm, φ62mm), Two joints, instruction manual, Warranty Card
1. Measurements obtained from in-house tests at Olympus, using new or fully charged batteries. Actual figures may vary depending on shooting conditions.
2. Batteries may not withstand lower temperatures. In such environments, keep batteries warm prior to use.
Specifications are subject to change without notice.
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I recently purchased the STF-8 twin macro light set. It is easy to attach to the M.Zuiko 60 mm f/2.8 macro lens only taking a minute or two. Thus far I've only used the STF-8 in TTL mode. The results have been very good. It is easy to move the flash heads around the mounting ring and adjust the shooting angle of the individual heads.
I may investigate using some very small flash ball heads with the STF-8 to move them further away from the subjects to see if I can get even better light distribution. The STF-8 even works very well with extension tubes for even more magnification effect.
If you enjoy hand-held macro photography the STF-8 twin macro light kit will dramatically extend your image possibilities. They are pricey, but you get what you pay for. I like the fact that they are weatherproof as one of my favourite subjects are flowers in a light rain.
I do quite a bit of macro and close up photography and have tried many different lighting systems. The STF-8 twin flash is the most versatile on-camera lighting that I have used. It perfectly matches the 60mm macro lens and provides any number of options for direction and relative power. At the same time it is small and lightweight. The flash system is not as hard to assemble as it looks, and the included case packs the entire system for travel.