Question about Canon Speedlite 550EX TTL Flash

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Flash won't shoot

When turned on, it appears the flash is ready to shoot, but never fires when the shutter is released on my canon 20D or 10D

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  • 78 Answers

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.

Posted on Mar 10, 2009

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Now what?


Nothing is going on. Your camera is working as designed.
Most cameras have an upper limit on the shutter speed when used with flash. This is called the flash sync speed. At speeds higher than this the shutter is never opened completely, and as a result you would get only a narrow slit of a picture.
Usually this is not a problem since the exposure is determined almost exclusively by the flash and the aperture. Any action is caught and stopped by the brief flash, not the shutter. The primary reason for controlling the shutter speed is to use a slow speed to allow the background to expose.
Your camera may have a special high-speed flash mode that fires off multiple flashes coordinated with the shutter movement. Since you didn\'t say what model Canon camera you\'re using, I can only suggest you check the manual.

Apr 26, 2013 | Canon Speedlite 430EX TTL Flash

1 Answer

Sb800 firing without pressing shutter release


sounds like a short in one of the circuit boards, most likely one or seveal of the ribbons and boards will need to be replaced to correct the problem. Send in for repair expect to pay up to $200 for a Nikon factory overhaul

Feb 21, 2010 | Nikon Speedlight SB-800 TTL Flash

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580EX speedlite not firing


Does the pilot lamp light up? If so can you fire it manually by pressing on it? If the batteries are low it may simply just be taking a while to charge, the camera will not wait for it to be ready to fire and it may seem to be not working. If your flash can be fired manually however, there may be a problem with the cameras shutter or the hotshoe. You can do a basic check by pressing the star button at the rear of the camera, you should get a pre-flash. If not, there is a problem with the cameras hotshoe which you will need addressed by a service centre. If you get a preflash you can next check the cameras shutter by setting the second curtain to sync with the flash. This can be done via the cameras "Custom Function" menu, c-Fn 15. Set the camera to TV mode and chose a 1 second exposure. Take a shot with the flash attached, if the shutter is working correctly, the flash should fire a pre-flash and then a main flash. If it doesnt, the switch inside the shutter is broken and the shutter needs to be replaced. This is a pretty labour intensive repair and you may consider an upgrade as more economical.

Apr 14, 2009 | Canon SPEEDLITE 580EX TTL Flash

1 Answer

Vivitar 6000CAF for Canon EOS doesn't seem to work on my Canon 30D EOS camera?


A more appropriate product is Suntax DRF14C for Canon 10D, 30D.
http://www.suntax.com.sg/DRF14.html

Apr 01, 2008 | Vivitar 6000AF for Canon TTL Ring Light...

4 Answers

Flash stopped workin as master in wireless mode?


Hi Joelgue,

Now, go to a real camera store and bring your equipments with you.

Say to them:

I have a Canon 580EX Flash and wanted to know if you have the Quantum Turbo Battery with the Adapter Cord for my 580EX?

Ask to see if you can test them out.

This adapter does not go into the 4AA battery hold but to the flip out cover, AC Adapter. You need to plug it into the flash.

Press "On" from the Q battery, then set flash to "Master" on camera and other EX to "Slave".

Turn all three on(1st flash, 2nd flash and camera.

Do not press shutter button but press the pre-flash(pre-auto lock/flash) on camera body. On the EOS-1Ds Mark III has "*".

Both flashes should come on.

Now, press the camera shutter using "ETTL Modes" and look at the image from the LCD screen...is exposure correct?

Address to this address from now, please: atdlee@netzero.com

PS: You did set both flashes into same channel and with no exposure adjustment, right?

May 25, 2007 | Canon SPEEDLITE 580EX TTL Flash

2 Answers

Problem with AF-360FGZ Flash


Yes. The *istD shutter can only provide X-sync for electronic flash up to 1/150 sec. The *istDS reaches 1/180 sec. "High speed" electronic flash is done by strobing the flash repeatedly during the period that the shutter slit is traveling across the focal plane, at th expense of cutting power output quite a bit.

Sep 08, 2005 | Pentax AF-360 FGZ TTL Flash

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