Anyone who has a little busy with flash photography knows that it is reprehensible to put his system flash to the hot shoe of the camera and thus flashing dead victims before the lens. Even with the sophisticated flash systems like ETTL remains flat preprogrammed a quasi point source of light in the same axis as the lens, and thus are harsh shadows and red eyes a little flash to the camera. Now you can remotely control a long time remote flashes - * Using a suitable cable, * On the built-in camera flash (with Canon works fine at 50/60 / 70D and 7D, I can not say anything about other models, then you should however use the camera flash only to control and turn off when the exposure - for that there a menu option in the Canon flash menu) * Via an infrared flash (there original Canon or for very little money by Yongnuo) * A silly radio flash trigger (eg RF-602 by Yongnuo) * A TTL remote control To the latter it goes here. Why TTL when in any guide book is ambitious flashes that you should set the flashes only manually (because the light in ETTL from picture to picture may differ slightly again and also the lightning not come to full power)? Because you can send a TTL spark gap lightning and commands to control his power or even to adjust the zoom head. And that increases the comfort already considerably when the flash is attached to the upper end of a lamp stand in 10m distance. Running back and forth, or to invest in a reasonable flash control? I opted for the latter and now use the YN-622C with two RF-622nd What's going on? All this and much more ;-) The YN-622C can control three flash groups individually, without having to take a detour via the flash menu in the camera. That is in itself very pleasant. But is the fact that you set here also for each group to zoom individually, with each flash between ETTL (if available) and select manual mode and also can flash with High Speed Sync. The latter allows shutter speeds shorter than the minimum allowed actually sync speed (usually 1/200 to 1/250). However, one must be aware that the flash with HSS can emit significantly less power because he fires an extremely fast Salve short single flashes. In addition, the YN-622 (switched off) illuminates the object with a red grid pattern, which the camera makes focusing easier. With these functions, it has already paid (together with at least one RF-622) of the YN-622. But there's a cherry on top. The YN-622 also supports the so-called SuperSync, an alternative technique for flash below the minimum synchronization time. Normally, this studio flash units is reserved because their flash tubes significantly longer Abbrenndauern than flash units. But: I have even tested with a cheap Yongnuo 560 - a "stupid" Manual flash at full power brings with SS significantly more light "to the finish" as an intelligent flash with HSS. And for that to work, you can adjust the exact trigger for the flash-forward at the YN-622. However, it works reliably even at full power, because at reduced power, the freezing flash is shortened (tested: Canon 7D with YN-622 / RF-622, attached to it a simple Phottix spark gap, and raised over it a Yongnuo 560 - works to 1 / 8000!) Among the criticisms: As far as I could see, it concerns with SuperSync is a global setting, so for all unused flash groups applies, but since we do not want to be petty times ... Also, the YN-622 course blocked the hotshoe, is to get over, because who wanted already as necessarily a flash it stuck (so). Shiny plastic surfaces are not really my thing (because they are scratch-prone and not long remain shiny), but that's a matter of taste. There remains the battery indicator that has irritated me somewhat: With freshly charged NiMH batteries were after a few flashes of only two (of three) bars in the display. This should be considered when packing the camera bag. All in all, at least from me on this hammer price a real buy recommendation!
