What Is A Slave Flash For Digital Camera

newbie: what is slave and master flash?

May 6, 2010

howdy, need to know about the slave and main flash.

is the strobe is a principal?

Re: newbie: what is slave and master wink?

tenggiri10 wrote:

howdy, need to know about the slave and master wink.

is the strobe is a main?

The master is triggered direct by the camera. I or more than slaves are trigged non from the photographic camera, but past the chief.

Typically the light from the primary is detected by a sensor fastened to the slave which causes the slave to fire. This all happens so rapidly that it appears to exist simultaneous. The link from master to slave might also exist via infra-ruddy or radio.

I'd prefer to reserve the word strobe for a flash which can burn multiple times very quickly, producing results like this one:
http://world wide web.newscientist.com/gallery/on-the-move/5

Regards,
Peter

Mike_PEAT • Forum Pro • Posts: thirteen,344

Yous tin adopt it all you desire, but information technology won't happen!

sherwoodpete wrote:

I'd prefer to reserve the word strobe for a wink which can fire multiple times very rapidly, producing results like this one:
http://world wide web.newscientist.com/gallery/on-the-movement/5

What you phone call a strobe is actually a stroboscope (which doesn't have to be xenon based, it can actually be incandescent, led, or other forms of lighting).

In photography though, a strobe is a big flash...and we're stuck with information technology. Just similar nosotros're stuck with the term "crop factor" for whatsoever sensor smaller than the misnamed "total frame" sensor.

Mike_PEAT • Forum Pro • Posts: 13,344

Re: newbie: what is slave and master flash?

tenggiri10 wrote:

hello, need to know about the slave and master wink.

A slave (optical slave) is a device that's connected to another wink or large strobe that triggers that device to fire when information technology "sees" another wink firing.

Notation though that most digital cameras/flashes burn a preflash which triggers the optical slave prematurely so that the slaved flash is actually night for the exposure. In those cases yous have to disable the preflash for it to work properly.

Also some brands have smart TTL flashes that tin can work wirelessly...these are too slaved from the main/master wink, merely they receive a "morse lawmaking" of flash pulses which tell them how to light up the scene.

Mike_PEAT wrote:

sherwoodpete wrote:

I'd prefer to reserve the discussion strobe for a wink which can burn down multiple times very rapidly, producing results like this one:
http://www.newscientist.com/gallery/on-the-move/5

What you telephone call a strobe is actually a stroboscope (which doesn't take to be xenon based, it tin actually be incandescent, led, or other forms of lighting).

In photography though, a strobe is a large flash...and we're stuck with it. Just like nosotros're stuck with the term "ingather gene" for whatsoever sensor smaller than the misnamed "full frame" sensor.

Basically it's the divergence betwixt British and U.Southward. usage. Naturally I prefer the usage which is normal in my own state.

Similarly I shall continue to use the discussion "torch" for a manus-held device which emits a continuous light. Different other regions which employ the term "wink-lite" for such a device. Having already used the term "flash-light" for a continuous light, I suppose it was inevitable that there was no word remaining for an actual flash light.

As for the strobe effect, that tin can exist produced by a uncomplicated mechanical device, such as a disk with many regularly-spaced holes, which is rotated rapidly, and the subject is viewed through the holes. Hence the derivation of the term from the Greek "strobos", significant "act of whirling".

Regards,
Peter

chuxter • Forum Pro • Posts: 21,714

Re: newbie: what is slave and master wink?

tenggiri10 wrote:

hi, need to know about the slave and main wink.

The "master" flash is in control of the "slave" flash(es).

is the strobe is a master?

Not sure what you hateful?

In that location are many different configurations. The simplest and oldest is to accept a photo-detector on each "slave" flash that burn it when the "master" flash goes off. Back in the good old days, there were no "slave" flashes...you bought a picayune adapter that you lot put a flash on...the adapter had the photo-detector to trigger the wink on height. Now-a-days, some flashes take photo-detectors built in...they work the same way, merely more convenient...you just switch the flash to "slave" style and voila'...

Simply there are more complex flashes too. Now-a-days, nigh flashes take a TTL-motorcar fashion, where the flash emits a weak pre-flash and the photographic camera looks at the exposure and computes how much calorie-free the flash must produce for the exposure, then sends a command to the flash and and so tells information technology to actually wink. On adept cameras, this happens actually quickly...you can't see it happening. On bad cameras, the time delay between the pre-flash and the main flash is so long that people take time to shut their eyes after seeing the pre-flash! But presently things got more than complex. Some idiot wanted to be able to include the "slave" flash(es) IN the TTL-motorcar loop. So manufacturers started sending out a coded message, subsequently the pre-flash, just before the main flash. It'southward like this:

[click]...[buzz]...[ POW ]

With this system, the photographer can control the output of many "slave" flashes from the photographic camera. Like make "slave" #1 a bit brighter than "slave" #ii...and all the same have all the flashes under TTL control (thus, when the ambient low-cal changes, the exposure is still "right").

These new click/buzz/POW flashes don't play nicely with the older varieties. The trouble is that the [click] and [buzz] are bright enough to trigger the "slave" and [Pw]...it goes off prematurely. There are some fancy, quondam flashes that have a filter for the relatively high-frequency [click] and [fizz], merely most will not be that sophisticated.

The fancy, new click/buzz/Pow flashes are smart enough to have different "channels" then that other photographers close past, who have the same click/buzz/Pw flash system can each select a different "channel" to eliminate interference betwixt each of their systems. Only other users who have older systems can still be triggered by the [click] and [buzz].

Bottom Line: Get a Nikon system, acquire to use their CLS, and wait downwardly your olfactory organ at other photographers w/ lesser systems.

Really, don't practice that last part!

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Charlie Davis
Nikon 5700, Sony R1, Nikon D50, Nikon D300
HomePage: http://www.1derful.info
"...photography for and of itself – photographs taken
from the world as information technology is – are misunderstood as a
drove of random observations and lucky moments...
Paul Graham

Nikon D810 Nikon D500 Tamron SP 90mm F2.8 Di VC USD 1:1 Macro (F004) Sigma 24-105mm F4 DG OS HSM Tamron SP 150-600mm F5-6.iii Di VC USD +2 more

OP tenggiri10 • Regular Member • Posts: 172

Re: newbie: what is slave and master flash?

In respond to chuxter • May 6, 2010

chuxter wrote:

tenggiri10 wrote:

hullo, need to know about the slave and master flash.

The "main" flash is in command of the "slave" wink(es).

is the strobe is a master?

Not sure what you mean?

In that location are many different configurations. The simplest and oldest is to have a photograph-detector on each "slave" wink that burn it when the "master" wink goes off. Back in the skilful old days, there were no "slave" flashes...you bought a little adapter that you put a flash on...the adapter had the photo-detector to trigger the wink on summit. Now-a-days, some flashes have photo-detectors congenital in...they work the aforementioned mode, but more convenient...you merely switch the flash to "slave" way and voila'...

But at that place are more circuitous flashes too. Now-a-days, most flashes have a TTL-auto way, where the flash emits a weak pre-flash and the camera looks at the exposure and computes how much light the flash must produce for the exposure, and then sends a control to the wink and then tells it to actually flash. On good cameras, this happens really rapidly...you can't come across information technology happening. On bad cameras, the time delay betwixt the pre-flash and the main wink is and so long that people accept time to shut their eyes after seeing the pre-flash! But shortly things got more complex. Some idiot wanted to exist able to include the "slave" wink(es) IN the TTL-auto loop. So manufacturers started sending out a coded message, after the pre-flash, but earlier the master flash. It's like this:

[click]...[buzz]...[ POW ]

With this system, the photographer can control the output of many "slave" flashes from the camera. Like brand "slave" #1 a bit brighter than "slave" #ii...and yet have all the flashes under TTL control (thus, when the ambience light changes, the exposure is still "right").

These new click/buzz/POW flashes don't play nicely with the older varieties. The problem is that the [click] and [fizz] are bright enough to trigger the "slave" and [POW]...it goes off prematurely. There are some fancy, old flashes that accept a filter for the relatively high-frequency [click] and [fizz], just nigh will non exist that sophisticated.

The fancy, new click/buzz/POW flashes are smart plenty to take different "channels" and then that other photographers close by, who have the same click/buzz/Pw wink organization can each select a unlike "channel" to eliminate interference between each of their systems. But other users who have older systems can still be triggered by the [click] and [buzz].

Bottom Line: Get a Nikon organisation, learn to use their CLS, and look down your nose at other photographers w/ bottom systems.

Actually, don't do that last part!

what is the unlike between Canon 430EX and 580 EZ? I read, the 430ez tin exist a slave not a primary.

Mike_PEAT • Forum Pro • Posts: 13,344

Flashlights and torches...

sherwoodpete wrote:

Similarly I shall go along to utilize the word "torch" for a mitt-held device which emits a continuous light.

Then what practise you telephone call "a portable source of fire used as a source of calorie-free, usually a rod-shaped piece of wood with a rag soaked in pitch and/or some other flammable material?"

Unlike other regions which use the term "wink-light" for such a device. Having already used the term "flash-light" for a continuous light, I suppose it was inevitable that there was no discussion remaining for an actual flash lite.

Early flashlights "ran on zinc–carbon batteries, which could not provide a steady electric electric current and required periodic 'residue' to continue functioning. Because these early flashlights also used energy-inefficient carbon-filament bulbs, "resting" occurred at brusque intervals. Consequently, they could be used only in cursory flashes, hence the popular name flashlight."

Personally I always thought because there are flashlights that can both flash on & off, and light up steady.

chuxter • Forum Pro • Posts: 21,714

Re: newbie: what is slave and master flash?

tenggiri10 wrote:

what is the different between Canon 430EX and 580 EZ? I read, the 430ez can exist a slave not a master.

I'k not a Canon flash expert. The 430 doesn't put out every bit much light as the 580. The "Guide Number" is the way to tell (but be sure that the GN is beingness quoted the same for each unit...feet vs meters and the FL).

The 580 is also more "avant-garde"...information technology has more features.

I Googled " Canon 430EX vs 580EX " and found the following comparing at:

http://www.the-digital-flick.com/Reviews/Catechism-430EX-Speedlite-Flash-Review.aspx

" Ane of the primary differences between the 430EX and the 580EX is the amount of lite each can provide. The 430EX has a Guide Number of 141' (43 m) while the 580EX has a Guide Number of 190' (58 m) (both at 105mm). The 430EX is not under powered for many uses, just the 580EX's significant power advantage can get important when using a flash modifier such as an umbrella, softbox or diffuser - or bouncing light off a loftier ceiling. In addition to being more powerful, the 580EX allows 1/1 (full power) to 1/128 power in 1/3-stop increments while the 430EX allows power settings from 1/one to i/64 in more granular 1-stop increments.

" The other primary deviation is that the 580EX tin be used as a principal to trigger remote Canon wireless slave flashes while the 430EX can only deed as a slave wink. Whatsoever number of Canon 430EX, 420EX, 550EX and 580EX Speedlites tin exist combined equally slave units but simply the Canon 550EX and 580EX Speedlites tin act as slave masters. In addition, the Canon Macro Band Lite MR-14EX, Macro Twin Lite MT-24EX, or Speedlite Transmitter ST-E2 can be utilized used every bit wireless slave flash masters. Many people start out with a Canon Speedlite 430EX Flash (or started out with 420EX) and later move upwardly to a 580EX. The 430EX can then exist used as a remote flash. "

Google is your friend...

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Charlie Davis
Nikon 5700, Sony R1, Nikon D50, Nikon D300
HomePage: http://world wide web.1derful.info
"...photography for and of itself – photographs taken
from the world as it is – are misunderstood as a
collection of random observations and lucky moments...
Paul Graham

Nikon D810 Nikon D500 Tamron SP 90mm F2.8 Di VC USD i:i Macro (F004) Sigma 24-105mm F4 DG Os HSM Tamron SP 150-600mm F5-6.three Di VC USD +2 more

OP tenggiri10 • Regular Member • Posts: 172

Re: newbie: what is slave and master flash?

In respond to chuxter • May 7, 2010

cheers, i've learned something here

chuxter wrote:

tenggiri10 wrote:

what is the different between Catechism 430EX and 580 EZ? I read, the 430ez tin can be a slave not a main.

I'g not a Canon flash good. The 430 doesn't put out equally much lite as the 580. The "Guide Number" is the way to tell (merely be certain that the GN is beingness quoted the same for each unit...anxiety vs meters and the FL).

The 580 is also more "advanced"...it has more features.

I Googled " Catechism 430EX vs 580EX " and establish the following comparison at:

http://world wide web.the-digital-moving-picture show.com/Reviews/Canon-430EX-Speedlite-Flash-Review.aspx

" One of the chief differences betwixt the 430EX and the 580EX is the amount of calorie-free each can provide. The 430EX has a Guide Number of 141' (43 m) while the 580EX has a Guide Number of 190' (58 grand) (both at 105mm). The 430EX is not nether powered for many uses, just the 580EX'south meaning power advantage can become important when using a wink modifier such as an umbrella, softbox or diffuser - or bouncing calorie-free off a high ceiling. In addition to being more powerful, the 580EX allows 1/1 (total power) to 1/128 power in 1/3-finish increments while the 430EX allows power settings from ane/i to 1/64 in more than granular 1-stop increments.

" The other main difference is that the 580EX can exist used as a chief to trigger remote Canon wireless slave flashes while the 430EX can but act as a slave flash. Whatsoever number of Canon 430EX, 420EX, 550EX and 580EX Speedlites can be combined equally slave units only only the Canon 550EX and 580EX Speedlites tin human activity as slave masters. In addition, the Canon Macro Ring Lite MR-14EX, Macro Twin Low-cal MT-24EX, or Speedlite Transmitter ST-E2 can be utilized used equally wireless slave flash masters. Many people start out with a Catechism Speedlite 430EX Flash (or started out with 420EX) and after move upward to a 580EX. The 430EX can and so be used as a remote flash. "

Google is your friend...