© 2017 by Flits & Flash

 SPECIFICATIONS

 EINSTEIN FLASH E640 

We are pleased to present the most advanced integrated studio flash system ever conceived - Einstein™.

640 Ws max. at full power   |   28,000 Ls at full power   |   1/10 to 1.7 seconds

 CONVENTIONAL FLASH VS. IGBT CONTROL 
 Download user manual 

Conventional Variable Voltage Control: Figures 1 and 2 show the flash waveform from a conventional variable voltage monoflash. As power is reduced, both the t.5 and t.1 flash durations become longer as power is reduced. Note that even beyond the t.1 point the flash continues to trail off slowly, adding motion blur. The color temperature drops as power is reduced.

Einstein E640 IGBT Control: In Figures 3 and 4 below, notice the flash abruptly shuts off at whatever point is needed to produce the desired output. The t.1 flash durations can be as fast as 1/13,500 second at low power, producing crisp action freezing. But the color temperature rises as power is reduced. This depicts the Einstein Action Mode. In the Constant Color Mode, the Einstein processor compensates by adjusting both the shutoff time and the voltage such that a constant 5600ºK color is achieved. The flash duration drops less rapidly as power is reduced, but still produces very short t.1 times (1/8000 second at minimum power) and extremely sharp action freezing.

 IGBT ADVANTAGES

Even the most expensive professional monolight flash units usually control flashpower by varying the voltage applied to the flash capacitors. This simple and inexpensive method has three distinct limitations to the achievement of truly professional performance:

1. The range of power reduction is typically limited to 1/8 to 1/32 power, often resulting in an inability to achieve low aperture settings with close lighting techniques.

2. As power is reduced, the flash duration becomes longer - typically twice as long at minimum power relative to maximum power. The median t.1 flash duration of the ten most popular pro monolights ranges from 1/200 second to 1/400 second – too slow for sharp freezing of action in sports, dance and other rapid movement shots.

3. Color temperature typically varies by 75ºK to 80ºK per f-stop of power reduction, resulting in about 400ºK color difference between minimum and maximum power. The Einstein unit employs proprietary advanced digitally controlled IGBT technology to control flashpower. This results in an extreme range of power reduction (1/256 power) in precise 1/10f stops. As power is reduced, the t.1 flash duration also decreases dramatically instead of increasing. This technology allows the Einstein unit to maintain a constant color temperature throughout the entire 256:1 power range.

Two operating modes are provided – ACTION Mode and CONSTANT COLOR Mode. In Action Mode, the t.1 flash duration shortens rapidly from 1/588 seconds at full power to 1/13,500 seconds at minimum power for incredible action freezing capability, but the color temperature increases as power is reduced. In Constant Color Mode, the t.1 flash duration drops less rapidly, to a minimum of 1/8000 second, while maintaining a constant color temperature of 5600ºK (+/- 50ºK) throughout the entire power range. The internal processor controls the accuracy and repeatability with very high precision.

ACTION Mode: In Action Mode, the color temperature rises as power is reduced, but the t.1 flash duration is minimized even further for maximum action stopping capability where absolute color consistency is secondary to motion freezing. At 1/2 power in Action Mode, the t.1 flash duration is approximately 1/2000 second and the color temperature is approximately 5750ºK (absolute values of flash duration and color temperature are indicated on the rear LCD display).

 

CONSTANT COLOR Mode: In this mode, the emitted color temperature is held constant at 5600ºK, plus or minus 50ºK at any power setting or input voltage. At full power, the t.5 flash duration is 1/1600 second and the t.1 time is 1/568 second. As power is reduced to 1/2 power the color remains constant, while the flash duration decreases to 1/1351 second t.1 (note that with IGBT control, the t.5 spec is no longer meaningful, so only the t.1 flash duration appears on the rear LCD display). As power is further decreased, the color temperature remains constant and the t.1 flash duration falls ultimately to 1/8000 second at the lowest power settings.

Einstein Flash Figures Flash Duration

Conventional Variable Voltage Control: Figures 1 and 2 show the flash waveform from a conventional variable voltage monoflash. As power is reduced, both the t.5 and t.1 flash durations become longer as power is reduced. Note that even beyond the t.1 point the flash continues to trail off slowly, adding motion blur. The color temperature drops as power is reduced.

Einstein E640 IGBT Control: In Figures 3 and 4 below, notice the flash abruptly shuts off at whatever point is needed to produce the desired output. The t.1 flash durations can be as fast as 1/13,500 second at low power, producing crisp action freezing. But the color temperature rises as power is reduced. This depicts the Einstein Action Mode. In the Constant Color Mode, the Einstein processor compensates by adjusting both the shutoff time and the voltage such that a constant 5600ºK color is achieved. The flash duration drops less rapidly as power is reduced, but still produces very short t.1 times (1/8000 second at minimum power) and extremely sharp action freezing.

IGBT Figures

Einstein™ is a powerful, all-digital, self-contained flash unit using multiple IGBT devices to allow a 9 f-stop power variability range from full (640 Ws) to 1/256 power (2.5 Ws), adjustable in precise 1/10 f-stops with voltage regulation consistency over the entire operating range.

Einstein™ offers global plug-and-play with automatic power switching that allows the unit to operate on power lines from 95VAC to 265VAC, 50 or 60Hz, automatically sensing the voltage / frequency and adjusting accordingly with no user attention required.

Einstein™ recycles to full power (at 120VAC or at 240VAC, 50Hz) in just 1.7 seconds, with the recycle time proportionally decreasing as the power setting is reduced. When recycle is complete, the READY state can be indicated both audibly and visually, selectable from the rear panel. An advantage of the IGBT flash control is that, at reduced power settings, the flash capacitors are not completely drained when the unit is fired making it possible to perform a rapid sequence of shots as the unit can be fired before the READY state is reached. Depending on the power setting and number of frames per second being shot, this can produce successive reductions of exposure value and color temperature in a rapid series of shots at relatively high power. In typical fast action sports shooting, setting the power to around 1/10 power (64 Ws) will allow frame rates or bursts on the order of five to ten frames per second with excellent frame to frame consistency and extremely sharp action freezing.

Two distinct operation modes are available from the rear panel: the Constant Color mode and the Action mode. In Constant Color mode, the emitted color temperature is held constant at 5600ºK (+/- 50ºK at any power setting or input voltage). The flash duration ranges from 1/540 second (t.1) at full power to 1/1700 second (t.1) at half power to 1/9,000 second (t.1) at the lowest power setting. In Action mode, the flash duration is minimized for maximum action stopping capability where absolute color consistency is secondary to motion freezing. At half power in Action mode, the flash duration is approximately 1/2000 second (t.1) and the color temperature is approximately 5750º K. In this mode, the color temperature rises as power is reduced.

Einstein™ includes a flash sensitive built-in slave tripper for wireless firing and arrives with a standard 1/8" to PC sync cord for direct camera connection. The unit may also be fired from the optional CyberSync™ CSXCV Transceiver / Cyber Commander™ or third party radio triggers. See the Compatibility tab for more info.

Adjustments are made with the function and adjust buttons on the back control panel, with all parameters displayed on the back-lit, high resolution color LCD screen (320 x 240 pixels, 2.4"). At all times, the screen indicates the output level of the flash (the f-stop, wattseconds, and EU number), the color temperature, the t.1 flash duration, the output level of the modeling lamp (the f-stop and watts), the modeling lamp setting (on, off, track or independently adjustable), the recycle READY status and setting, the slave eye status, the action or color mode selection, and the CyberSync™ channel and frequency selection.

Einstein™ additionally features an "Easy Set" button used for instant setup to the most commonly used function parameters. When pushed, Einstein™ is ready to use in plug-and-play fashion for most users, with both visible and audible READY indicators, the slave sensor on, Constant Color mode selected and CyberSync™ channel/frequency both set to '1'. After pushing the "Easy Set" button, the user can then use the function button to change any of the settings mentioned.

Each unit arrives with a UV-coated, single-ring flashtube and a standard 250 Watt (120V) bayonet-style quartz modeling lamp that is precisely voltage-controlled to maintain consistent luminosity and to track flash power within +/- 1/10 f-stop at any AC input voltage and any power setting within its specification. The design of the modeling lamp regulator is proprietary to Paul C. Buff™ and yields dramatically less interference transmitted back to the power line in comparison to the unregulated and inaccurate household-style "phase control" dimmers used in most flash units. A frosted pyrex dome protects the lamp and tube from damage and serves to reduce UV emission from the flashtube. It equalizes the effective size and shape of the modeling lamp and flashtube as the modeling lamp filament is in exactly the same focal point as the UV-coated flashtube, resulting in an extremely close relationship between the flash and modeling light. The dome lowers the color temperature by approx. 300K. An optional UV-coated dome (sold separately) further lowers the color temperature by approximately 600K.

A high velocity fan and improved airflow coupled with multiple internal heat sensors and circuit fault detection assure reliable performance under the most demanding commercial shooting.

Einstein™ also includes a Micro SD card slot for a standard 2GB card (not supplied), used to upgrade the firmware via download or email should features be added in the future.

Flash Duration Einstein VS Elichrom