please take a look at that:system I build myself using Arduino
https://www.photomacrography.net/forum/ ... 41#p186841
https://www.facebook.com/photo?fbid=147 ... 0269581589
flash ( 4 * YN660 )
https://www.facebook.com/photo?fbid=120 ... 0269581589
1/10s is the shortest, stable exposure time I use for the flash and the fully electronic shutter.cheap flash/continueous
1/15 also works, but 1/20 no longer.
The longer exposure times as 1/5s, 1s, 2s, etc. can of course also be used.