Full Specifications & Features


Basic information

Dimensions (Approx.)
W 69.4mm X H 113.7mm X D 88.3mm (2 3/4inches × 4 1/2inches × 3 1/2inches)
317g (11.2 oz) (only main unit)


Auto electronic flash (clip-on type) with pre-flash metering
Shoe type
Multi Interface Shoe.

Flash Head(Light-emitting unit)

Maximum Guide number
45 (Flash coverage setting 105mm/STD flash distribution,ISO100・m)
Flash coverage
AUTO/MANUAL(24mm-105mm)Angle of view of at 15mm focal length is also covered with the wide panel
Flash mode
Flash Duration (Approx.)
Within 1.7ms(1/1 MANUAL)
Color Temperature (Approx.)
Frequency (Approx.)
0.1-2.5 seconds(Alkaline battery)/0.1-2.0 seconds(Ni-MH battery)
Repetition (Approx.)
More than 210 times(Alkaline battery)/More than 270 times(Ni-MH battery)
Continuous flash performance
40 flashes at 10 flashes per second
Bounce flash
Bounce angle
Up 150deg (0deg/30deg/45deg/60deg/75deg/90deg/120deg/150deg) Down 8deg, Left and right 180deg (0deg/30deg/45deg/60deg/75deg/90deg/120deg/150deg/180deg)
Test flash
Flash control
Flash control using pre-flash (P-TTL/ADI)
Flash compensation
Power Level switching
22 levels(1/1-1/128) 1/3 steps
High-speed sync(HSS)
Modeling flash
Built-in wide panel
Built-in bounce sheet

AF illuminator

AF illuminator
Operating Range (Approx.)

Radio controlled wireless function

Radio Control Wireless Function
2.4 GHz band
14 Channels(Auto/manual)
Communication Distance (Approx.)
3 groups(TTL/MANUAL),5 groups(group flash photography)
Maximum Flash units
15 units
Lighting ratio control
3 groups(TTL)

Optical control wireless function

Optical Controlled Wireless Flash
4 Channels
Communication Distance (Approx.)
3 groups
Lighting ratio control
3 groups(TTL)

LED light function

Center Luminance Intensity (Approx.)
400 lx(0.5m)/100 lx(1m)
Lighting Distance (Approx.)
1 m (when recording movies, set to ISO 3200 & F5.6)
Focal length supported
35mm (35mm-format angle of view)
Continuous Lighting Time (Approx.)
4hours (with Sony AA-size alkaline battery)
Color Temperature (Approx.)
Power Level switching
10 steps

Other functions

Auto zoom control optimized for image sensor size
Flash distribution setting
Auto WB Adjustment
Custom key settings
Memory settings
Remote release


LCD panel
Yes(Dot matrix)
Charge progress indicator

External connectors

Sync terminal
Multi/Micro USB terminal

Power source

Power source
Four AA-size alkaline or Ni-MH batteries
External Battery Adaptor

Other features

Dust and moisture resistant design

What's In The Box

  • Connector protect cap(1)
  • Mini-stand(1)
  • Carrying case(1)


Picture of External Flash with Wireless Radio Control

High-power compact flash

This dramatically downsized compact lightweight clip-on flash with guide number (GN) 45 is best suited to use with the α7 series. The flash supplies powerful output even for bounce lighting, recycling only takes approx. 2.5 seconds, and stamina in performance delivers up to approx. 210 bursts.

Picture of External Flash with Wireless Radio Control

Built-in wireless radio control 

Use this flash with a compatible camera, for multi-flash shooting, even under strong sunlight or from relatively distant location thanks to its radio-controlled system. HVL-F45RM can be either wireless commander or receiver. As a commander, HVL-F45RM supports up to 15 units of compatible flashes or receivers in up to 5 groups, for connecting with remote units at up to 30 meters. It also works with optical wireless communications.

Picture of External Flash with Wireless Radio Control

Bounce head for flexible lighting

HVL-F45RM bounce head for flexible lighting rotates 360° horizontally (180° in both left and right directions) and also tilts 150° upward and 8° downward, providing the illumination you want depending on shooting situations.

Picture of External Flash with Wireless Radio Control

Quick Navi

Sony’s Quick Navi control interface provides easy, intuitive access to lighting parameters via one easy press of “Fn” button. Everything you need to know is right there on the screen and accessible using a few buttons and control wheel, thereby minimising the necessary operations required to adjust settings before you shoot.

Picture of External Flash with Wireless Radio Control

Customisable key assignment

Key customisation function allows easy assignment of frequently used features for quick operation. Customisable settings include lighting compensation level and flash output level. Customisable keys are highlighted in red.

Picture of External Flash with Wireless Radio Control

Tab-structure menus

You’ll enjoy effortless operation of flash features. Tab-structure menus on the LCD screen are the same as those on the camera body for fast access and intuitive use.

Picture of External Flash with Wireless Radio Control

LED light and AF illuminator

Cool running and energy efficient, the LED light enables you to create natural lighting and shadows for both movies and stills. Plus, AF illuminator supplies fill light to focus more easily on a subject in dark surroundings.

High-speed sync (HSS)

Take advantage of synced flash with high-speed shutter. Whereas conventional sync shooting required that the shutter speed be the same or slower than the synced flash speed, the aperture would be narrowed, making it difficult to get background bokeh effects. But with high-speed sync (HSS) you can use flash with any shutter speed, even up to the highest shutter speed provided by the camera. This allows you to increase the aperture as needed to create a narrow depth of field that keeps your subject in perfect focus while the background blurs, for beautiful portraits. Wireless high-speed sync is also possible with compatible cameras.

Picture of External Flash with Wireless Radio Control

Dust- and moisture-resistant design

Count on reliable flash even in challenging outdoor conditions with specially designed seals at joints around the durable body to keep out dust and moisture. This is a particular bonus in outdoor usage where you have no control over various factors including wind and environmental dust.

Through-the-Lens (TTL) wireless flash

Even when performing wireless flash shooting, flash output can be determined based on accurate measurement of the amount of light through the lens. Since you can freely change position and direction of the flash unit exactly as you want, it’s possible to soften intense shadows and suppress blown highlights when shooting a subject from right in front (of the subject), or add soft shadows that emphasise a sense of depth and presence. Wireless flash ratio control is available.

Advanced Distance Integration (ADI)

ADI provides automatic metering that is virtually unaffected by the reflectance of subjects or backgrounds, maintaining correct exposure even with overly reflective or overly dark subjects. It pre-flashes the unit to incorporate the reflected light measurement, together with precise distance information from a compatible camera’s lens, to achieve the optimum flash level.

Picture of External Flash with Wireless Radio Control

Test flash mode

The test flash mode enables you to check shadows on the subject before taking photos, and also to check the light level using an external flash meter, which is essential for studio photography. The light level of the test flash depends on the light level setting in manual flash (M) mode, and the flash unit fires with a light level of 1/1 in through-the-lens (TTL) mode.

Auto zoom control optimised for image sensor size

This flash unit automatically selects the appropriate flash coverage for the focal length of the lens on the attached camera within the range from 24mm to 105mm. This function also adjusts the flash zoom to match the camera’s image sensor size, minimising light fall-off at the image periphery. The flash coverage required for cameras using 35mm full-frame and APS-C size image sensors differs substantially, and this intelligent function automatically provides the optimum flash coverage for each.

Auto White Balance Adjustment

Colour temperature varies according to the environment you’re shooting in, and the colour temperature of a flash should match that of the ambient light to look natural. With this intelligent function, colour temperature information is transferred from the flash unit to the camera for correct white balance setting, to help you capture more natural-looking colour reproduction in flash photography.

Picture of External Flash with Wireless Radio Control

Multi/Micro USB port

This flash features Multi/Micro USB port for supporting software update to the latest version via connected PC.