Neewer 16 Channel Wireless Remote FM Flash Speedlite Radio Trigger with 2.5mm PC Receiver for Flash Units with Universal Hot Shoe

un produit facile d'utilisation même en multiflash , j'apprécie son utilisation

> Totally compatible with the older Neewer 4 channel model (= Cowboy NPT-04), if all senders and receivers are set to the same channel. I use the default “1234 up” on the 16 channel model, and “12 up” on the 4 channel model.> Other than 16 vs 4 channels, the only difference between the models is that the 16-channel sender has an on/off switch.> SENDER BATTERY LIFE – my original 4-channel sender lasted 3 years on the same battery, through many thousands of flash photos – even though it does NOT have an on/off switch. So, the battery of the 16-channel sender should last nearly forever if you remember to turn it off at the end of every session. Even so, the battery is a weird size (A23), and it may be a good idea to order extras. Keeping the extras in the frig (not the freezer) may extend the life.> RECEIVER BATTERY LIFE – Amazingly, ordinary AAA batteries can also last for years in the receivers, but ONLY if you remember to turn the receivers off after every session. If you leave a receiver on, the AAA batteries will probably be dead the next day.> CHANGING THE SENDER BATTERY – You have to remove a screw to take the sender apart to get at the battery. Note the orientation of the old battery (take a photo with your cell phone)-- the A23 battery has "nipples" ay both ends. Google “NPT-04" for several videos on how to change the A23 battery. The reason I purchased a 16-channel model to replace my 4-channel model was that when I opened the 4-channel receiver to change the battery, the antenna wire fell off, and I didn’t know where to solder it back (the little spot of solder on the front right edge (with the front pointed at you) – the antenna wire is only attached on one end. Fortunately the 16-channel model is virtually identical inside, which told me where to solder the antenna wire back. With a new battery (and the antenna wire back in place), my 4-channel system is working again.> BLUE PAINTER'S TAPE – the battery compartments of the recievers pop open easily (in which case they don't work), so I tape them shut with blue painters tape. The on/off switch of the sender is unmarked, so (with a Sharpie), I made a label "WHEN IT DOESN'T WORK -- Push the test button on the top of the sender -- if the little red diode on the receiver blinks, then the sender/receiver is working. If the red diode on the sender doesn't blink, then you've got a bad sender battery. If the red diode on the sender blinks but not on the receiver, then the receiver batteries are bad (or the channel switches are mis-matched). If both diodes blink, then you've got a problem with the flash unit (such as bad batteries) or a poor connection between the camera and the sender, or between the receiver and the flash unit. You can test your flash unit by pushing the test button on the unit. If the flash unit is operating properly, then remove and reinstall the sender from the camera, and the receivers from the flash units -- to make sure they are seated correctly. If that doesn't work, then check that the sender and receivers are set to the same channel.> MYSTERIOUS FAILURES -- Sometimes when you've eliminated all the problems listed above, the system still won't work -- or works erratically. The diodes will blink and the flash unit(s) will discharge when you press the test button on the sender (which implies that the connections and the batteries are fine), but the flash will not discharge when you press the shutter. Sometimes the cause is that the batteries are low -- usually in the receivers. Sometimes the connection is bad. Maybe there is radio interference in some cases Sometimes turning the camera off and back on seems to help. Mostly though, there is no apparent solution --- it seems as though some component (perhaps a resistor or capacitor) in the electronics is overheated. Whatever the problem, it usually clears up on its own in 5 minutes. Of course, that can be 5 very long agonizing insane minutes. So, chill

J'utilise beaucoup de produits Neewer depuis que j'ai commencé la photo il y a 4 ans, je suis rarement déçu, ce produit fait partie des meilleurs que j'ai acheté.Fait très bien son job pour un prix plus que raisonnable.

Me gusto el producto, quizá el plástico no es de la mejor calidad, pero el precio es bajo y trabaja muy bien con mi cámara y mis flashes canon.Es un producto que lo recomiendo,ademas mi pedido llego antes de lo programado.Gracias.

Personalmente ho dei trigger "seri", che lavorano in HSS ed E-TTL, con il trasmettitore con display che permette di configurare i flash direttamente, ma il costo di un set, 3 pezzi, è poco più di dieci volte il prezzo di questi. Quindi leggere commenti del tipo "non ci affiderei il mio spedlite Canon" mi fa un po' ridere. Uno che utilizza flash da 350 euro non va certo a "risparmiare" prendendo trigger del genere. Personalmente li ho presi per un amico a cui sto insegnando ad usare i flash remoti, e che ha due flash a contatto singolo vecchi di più di 15 anni. Li abbiamo provati e trovo che per quello che sono stati progettati e costruiti funzionano perfettamente. Su EOS 60D arrivano tranquillamente a 1/250, in un paio d'ore di utilizzo non hanno perso un colpo, e sono tanto semplici da usare che quasi fanno tenerezza. Base in plastica, peso e dimensioni molto contenute, tappo batterie fatto male (sforza contro la ghiera di fissaggio), ma stiamo parlando di due trigger che costano come una pizza e una birra!!! Unico "neo" secondo me è che usano mini stilo, quindi durata limitata, e che il trasmettitore utilizza una batteria per telecomandi di cancello, non riesco a capire come mai. Comunque basta saperlo, ne abbiamo presa una di scorta e il problema è risolto (il set da due, Duracell, costa 3,5 euro in ferramenta). Quindi posso dire che, per la mia esperienza, è un ottimo acquisto: due trigger manuali che fanno perfettamente il loro lavoro e costano una sciocchezza. Ottimi per cominciare a farci la mano con utilizzi del flash più seri e creativi. Se fra un anno vi piace, prendete due flash da 300 euro l'uno e dei trigger adeguati. Altrimenti li vendete su subito a 5 euro e pace. O altrimenti potete anche tenerveli finché durano, perché per molti utilizzi sono più che adeguati.

Amazing. Works flawlessly on my a6000 and my Meike MK-930 II flash. The flash's foot was somewhat incompatible, but with a small mod to mount the flash backwards, I was able to get this working in no time (5min). See my review of the flash for details. See attached pic for an action shot--so much lens flare!.Also works, no mods required, with my old Vivitar Thrystor flash. I have that flash for an old Minolta SRT 101, and I imagine many different flashes will work as well. I think I only had trouble with the Meike MK-930 II because mine is for the Sony MI hotshoe--which places the electrical contact way back in the foot.A number of people have complained of these failing after a while. I suspect that it is because the internal battery of the transmitter eventually ran out. There is no obvious way of changing that battery, but I guess I'll find out when mine dies--at which point I will take a screw driver to it and see where that takes me. Anyway, for $15 bucks, you can't go wrong, here.

Good...

With the flood of economical (cheap) flash triggers on the market, I was skeptical about buying these. Particularly with reviews of units sometimes failing or intermittent operation. Having to fuss with equipment while working with clients is worse than frustrating. It is embarrassing! I've been there having worked for a national studio chain. We used flash triggers that were 3-4 times more expensive than these and those triggers failed almost every session.So after some thought, I decided for the price that I had nothing to lose and ordered two sets. One of the sets didn't function right, but after communicating that to the seller, they simply sent me another set. No fuss with returns and great communication. The new set worked like a charm and I have been using these on location and in studio for about a year without trouble.A few things I have noticed. 1) Despite being sold as NEEWER brand, the ones I received were labeled WANSEN. Not a big deal as they otherwise look exactly as pictured but just worth noting in case someone gets confused. 2) The PC Sync cord could fit a little more snug into the receiver. There have been moments when the cord would easily just fall out. Granted this could be a good thing as it might save any equipment it's attached to from suffering any harm, but a firmer fit would still be nice. 3) Last thing worth noting is that when mounting the transmitter on the camera, keep the connector a little loose. I have tried this on several cameras and have found that if you tighten the nut firmly like you would your flash, then you increase the chances of a flash misfire. Leave it a little loose, or don't even tighten it at all, and the flash will fire far more dependably.Overall, these triggers have done what I have needed them to do. And in the year of ownership, I have yet to have to change the batteries in these. For someone that needs just a simple trigger for studio strobes or off camera flash guns, these are a pretty good deal.