For my first bikepacking warming trip I’ll be carrying my Einstein 640 Studio Flash to analyze how many times I’ll need it’s full power and how convenient is to carry this flash & it’s battery pack on a bicycle… maybe two small & cheap YN560IV mounted on a flash bracket is all I need when combined with a leaf shutter camera (Fujifilm X100s) with a 1/1000s flash sync.
I used a previous version of these Chinese manual flashes and never had a problem with them. This new version adds a master mode (or a radio transmitter unit) built into the flash that controls remotely the flash power (and flash zoom length) of 3 individual groups of YN560III & IV flashes.
|Circuit design||Insulated Gate Bipolar Transistor (IGBT)|
|Guide No.||58 meters (ISO 100, 105mm)|
|Flash mode||M, Multi|
|Triggering Mode||Camera set-up, TX, TX, S1, S2|
|Zoom range||24, 28, 35, 50, 70, 80, 105mm|
|Vertical rotation angle||-7~90 degrees|
|Horizontal rotation angle||0~270 degrees|
|Power supply||4×AAsize batteries (Alkaline or Ni-MH are usable)|
|Lighting times||100~1500 times (AA alkaline cell used)|
|Recycle time||approx 3s (AA alkaline cell used)|
|Flash control||8 levels of output control (1/128~1/1), 29 levels of fine tuning|
|External interface||hot shoe, PC port and eternal charging port.|
|Wireless triggering distance||100(2.4g wireless);20-25m indoor,10-15m out door (optical control)|
|Additional features||The electronic flash head zooming, sound prompt, automatically saving setting, power saving mode, overheating protection and advanced options.|