Question about Canon SPEEDLITE 580EX TTL Flash

1 Answer

My 580 ex flash fires but just at pre shooting, not when photograph is taken

When trying to fire flash , it goes off just before the shoot but not during the obturation. and this only happens when flash is set on ETTL. On manual mode it doesn't fire at all,
I obvioulsy checked the batteries, nothing wrong with it.
Only red light showing, not the green one

Posted by on

  • joelgue Feb 20, 2008

    ok, this I knew, my question is actually about the lack of sinch, what can it be due to?



    Thank you!



    Joelle

  • joelgue Feb 21, 2008

    Ok, thank you very much for your feedback, I'll try it on another camera.

    When I was talking about lack of synchronisation I meant that it looked like the flash was not reacting to the shutter, ie not firing off during obturation.

    Thank you once again!



    Joelle

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It's a pre-flash light that goes off.

atdlee@netzero.com

Posted on Feb 19, 2008

  • Alexander Lee Feb 20, 2008

    Hi Joelle,

    Take that flash to the store like Best Buy or Circuit City and try it out on the store camera.

    I am not sure what you are talking about lack of sync?

    Please see to my email, so I can help.

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1 Answer

My canon 580 EX II stops firing even with new batteries


You must disable the 580EX II form using the 4AA.

4AA must be needed when using hv power pack.

Just let the 4AA use & display the LCD panel.

More help, repairs & troubleshooting send me an email.

atdlee@netzero,com

Oct 21, 2012 | Canon Speedlite 580EX II TTL Flash

1 Answer

I have recently shot some pictures with my canon 580 EX flash. pictures seemed to be a bit underexposed. My camera is a 50D pictures shot at ISO 200. The lens was a canon 17-40 F4 L. Is is possible that...


It all depends on the environment you're shooting in. When shooting a wedding reception for instance inside in the evening I will generally use ISO 800 and I quite often use FE Lock which is very handy. FE Lock will pre-flash the speedlite and meter the result based on the center focus point in your viewfinder (it doesn't matter if you have set another focus point it will always meter to the center one so make sure that is over your subject when you use it). To use FE Lock press the button near your thumb that has the * symbol with the center focus point over the subject. You can then re-frame the shot if required and take the picture. The camera will take the picture based on that flash setting and you should find that the shot is better exposed.

Nov 18, 2010 | Canon SPEEDLITE 580EX TTL Flash

1 Answer

Ttl auto does not work


Digital Camera Fully Compatible, Newly Developed S-TTL System "S-TTL" enables TTL auto shooting by an external strobe for a digital SLR camera as well as for a point & shoot digital camera.
INON S-TTL auto strobe supports any manufactures' model providing highly accurate exposure control.
Film camera era without strobe selection problem TTL stands for "Through The Lens" and TTL auto strobe system controls flash amount to provide correct exposure based on calculation by camera's internal sensor metering reflecting strobe light from a subject through the lens. This TTL system meters actual light amount reflecting from a subject providing accurate exposure.
When we start with the history of underwater TTL auto strobe, underwater camera?"NIKONOS V" released in 1984 was the first to provide automatic TTL flash control for underwater strobe SB-102, SB-103 succeeded by NIKONOS V compatible underwater strobes form other manufactures. The 5 pin electrical sync connector for NIKONOS V is most popular and widely adopted to connect an underwater strobe and underwater film camera (underwater camera/housing).
A film SLR camera has flexibility to select an underwater strobe. As far as housing has NIKONOS type electrical sync connector and properly wired, automatic TTL flash control is usable with any TTL auto strobe like Nikon SB-105, INON Z-220, Z-22 connected via electrical sync cable.
NIKONOS type 5 pin electrical sync connector and NIKONOS V with INON Z-22 strobe
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Film camera compatible strobe is not usable for a digital camera!? Underwater TTL strobe circumstances have been drastically altered with the spread of digital camera among divers. Some underwater housing for digital SLR camera has NIKONOS type electrical 5 pin sync connector as same as film camera housing. Since the housing has same NIKONOS type sync connector, existing film camera compatible underwater strobe has been considered compatible with a digital SLR camera via 5 pin sync cable but happened to experience error message on the digital camera or blackout on an image even the strobe worked. Why this happened?
This is because automatic TTL strobe system difference between a film camera and a digital camera.

The film TTL auto system makes single flash while digital TTL auto system employs pre-flash type making two to three flashes. Film TTL auto strobe system starts firing at the same time the shutter opens and reflecting strobe light from a subject is recived at a film. The reflecting light on the film is metered by the sensor to determine when to cease firing for correct exposure. This process takes only about 1/1000 second.
In contrast, digital TTL auto strobe system can not calculate adequate exposure based on reflecting light from a subject since image sensor (CCD/CMOS) reflectivity is comparably low comparing to a film. So digital TTL strobe system gives preliminary flash for very short period of time (pre-flash) just before the shutter opens metering reflecting light from a subject by the sensor to calculate necessary amount of light for correct exposure and starts emitting main flash at the same time the shutter opens. Canon E-TTL and Nikon i-TTL employs this system.

When we connect conventional film camera compatible TTL strobe to pre-flash type digital SLR via sync cable, the strobe makes full dump by pre-flash signal then the shutter opens before the strobe has been fully charged resulting in quite under exposed image only with ambient light. Even two time flash compatible strobe like INON Z-220 strobe, does not fully support a digital TTL and force to use Manual flash mode.





Film SLR:
A strobe starts firing at the same time the shutter opens and quenches firing when correct exposure has been obtained.
A film compatible TTL strobe connected to a pre-flash type digital SLR via electrical cable flashes does not support TTL auto exposure resulting in synchronization only with first pre-flash or totally uncontrollable.
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The birth of digital fully compatible S-TTL S-TTL auto compatible INON D-2000 strobe and Z-240 strobe works in TTL auto mode by simply setting their main dial to S-TTL position. A film camera seems to depend more on photographer's skill, experience and feel since the camera does not allow checking images on site. A digital camera allows us to check images right after shooting and enable to try to shoot again as much as we like. And high capacity memory card further allows to shoot hundreds of images. The digital camera makes entry level of underwater photography getting down and nowadays more people buy a digital SLR camera and underwater housing even they have just started underwater photography. However underwater photography gets more difficult because underwater strobe does not work in TTL auto.
INON is among the first to support digital TTL auto system with "S-TTL" auto mode equipped D-2000 strobe and Z-240 strobe.
The proper name of S-TTL is "Optical Synch TTL". S-TTL enables to perform in TTL auto exposure as same as genuine TTL strobe from camera manufacture, based on camera's built-in flash light to use as a signal to be transmitted to a strobe. S-TTL uses digital camera's built-in flash light not as a light source but as like a controller to trigger S-TTL strobe.
The built-in flash of a digital camera makes weak flash (pre-flash) before main-flash to calculate exposure. This pre-flash is transmitted to S-TTL strobe to control the strobe to make pre-flash to a subject. The reflecting light from the subject goes through the camera's master lens to an image sensor then a processor calculates main flash light amount for correct exposure.?Finally the built-in flash makes main-flash which is transmitted to the S-TTL strobe to cause main-flash of the S-TTL strobe.


Digital camera's built-in flash lights are transmitted via an optical fiber to the
S-TTL strobe to make pre-flash and main-flash instead of the built-in flash.
white1px.jpg

Apr 30, 2010 | Olympus FL-20 TTL Flash

1 Answer

Flash won't shoot


does the red bulb show when the flash is ready to shoot ? you can press the button that lights red or green to test the flash on itself.

Mar 10, 2009 | Canon Speedlite 550EX TTL Flash

2 Answers

Sb800 doesn't flash


Let's force the flash to fire:


nstalls four fresh batteries.

Turn on flash, do not connect to camera

Wait until flash is ready

Get a small wire with insulation and strip both ends about 1/8".

With one end of the bare wire lead, touch/hold CENTER TIP

Contact(silver pin from flash).

Make sure flash head is not pointing at your face.

With other end touch bare wire to OUTSIDE Contact (silver on
outside of hot shoe that rides into camera hot shoe rails-this is ground).

Flash should fires, gets a flash out of the flash tube.

If not, you have flash problems.
You most likely hurt the flash by using the dome filter on top of flash.
Over 80% photographers are doing this way when shooting flash photography. And 95% for wedding photographers.

This will shorten the life of the flash.
Even more with that adapter parked onto the flash.

Hope they are helpful to all photographers.

Suggestions or comments,

atdlee@netzero.com

Jan 15, 2008 | Nikon Speedlight SB-800 TTL Flash

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