Question about Canon SPEEDLITE 580EX TTL Flash

3 Answers

My snaps are underexposed with 350D camera and 580EX TTL

I am using 580EX TTL with my Canon 350D camera. My snaps are underexposed even when I shoot at a distance of 8 feet - 13 feet. The camera and flash setting in auto.

Please help.

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  • Bernarga Apr 19, 2008

    I am also using canon 350D with 580EX flash. My pictures also under exposed by +2/3 stops.

  • Anonymous Jun 02, 2008

    Became a flash guru, eventually proved that it was the flash, not the user or settings. Luckily had extended warranty - replaced the whole flash head - have multiple 580 Ex's, have had more than one flash head fact I just got one back for this type of repair and it is 2.5 stops brighter than an identical flash bought at the exact same time used as much.

    Manual everything (flash, camera - even exposure because i found it to effect the result inconsistently, tripod, same subject identical conditions, write an experiment result report and send the CD of images (raw) to the repair guy) - check your histograms...they tell all.

    Also compared to a third flash for this and to confirm master slave function failing in particular flash. and even though my report was two pages of desctription, repair was done but not calibration......

    BEST ADVICE HAVE TWO OR THREE FLASHES AT LEAST PER PHOTOGRAPHER...I think with all the moving parts and the burst of energy, things wear out. I do weddings 2 a weekend usually 30 weekends a year at least - FLash on camera wearing out, backup for when light drops below acceptable level and 1 in for maintenance (Repair and shipping) - Cannot be without flash and backup on any given weekend. and in a pinch I have even been shorted down to my on camera flash - as a result of flashes becoming disabled -

    Also one last note - batteries - 2700 maH - i order from paulsfinest .com - i have an electrical engineering background - only batteries i have found that are reliable and consistant - tested regualarily by me - many say 2700, but are only 2500 even with conditioning, and lesser batteries drop off faster even down to 1900 - less power slower recycle - if your camera / flash is set to shoot prior to full recharge - lowered flash output makes brightness drop down as well.



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I have had two flash heads replaced under warranty for this exact reason, 1 for master slave not functioning.

things do wear out, buy extended warranties.

use all manual settings including exposure, flash, take raw images with same camera of same subject in same lighting conditions (indoors) and switch flashes between pictures submitting resulting images and notes re images and settings to repair to prove it is flash and not settings.

I just got a flash back for this situation and it is firing 2.5 stops brighter than the identical unit i bought at the exact same time. I needless to say i will be shipping another flash in for repair today.

I have three flashes 1 on camera 1 for back up - which i alternate weekend to weekend and 1 in rmaintenance (repair) / shipping.

I shoot 2 weddings a weekend (yesterday on my feet for 14 hours camera in hand) and have an engineering background -

Remember good batteries - sells powerex 2700 - i have tested / experiemented with many and these are the only ones i have found so far that are consistent and are actuall 2600+...

Sometimes it is the flash...

Posted on Jun 02, 2008


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Had the same problem with a 400d - only solution - buy a 30d

Posted on Jan 09, 2008


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Set camera:

Single shot mode not servo/C modes
Focus sensor set for center
Make sure exp. comp is not set on -(minus) side.
Make sure your subject is locked on and not moving out of the autofocus (center) sensor.

[email protected]

Posted on Jan 03, 2008

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Posted on Jan 02, 2017

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More help, repairs & troubleshooting send me an email.

[email protected],com

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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.

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Recently my canon speedlight 580 EX II TTL has been acting up...especially in low light situations. About on in 30 shots actually has enough light in them...the rest of the time the shots are...

that the camera/flash set-up I use ... there are many variables - iso/metering setting/shutter settings/flash settings .
If it's a flash function problem, try this to isolate it - first, with the diffuser/reflectors tucked into the flash head, and the head straight up, with the flash set in master mode, turn it on and look on the back screen. push the mode button til you see the ETTL in the upper left of the screen .. then press the set button in the center of the dial and the nuber in the center of the display should flash (+0) while the light is flashing, rotate the dial to change the setting (i usually under power by 1/3 stop. Play with the exposures a few times to get the feel for what the EV shifts do to your exposure. generally speaking, for interior low-light, i prefer to bounce off the ceiling (if low ceilinged), if there's too much direct it will give you an uneven and predominantly underexposed image.
if you prees the mode button you will come to the same options for adjusting the output in manual mode, but it will not work with the autoexposure in the camera.
Try playing with the ETTL settings
I think the problem may be that you have somehow altered the power output setting on the 580.

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Load 4AA with Energizer Lithium Batteries.
Set 580EX II's function to 12-0 and 05-0.
Make sure 5D's is not set to HSS.
No white dome parked on flash.
No bounce.
Set camera to "M" with max sync if you like, but 60 is fine.
Set F-Stop no greater than F5.6
Set ASA/ISO no lower than 200 but not over 1000.

If you need more assistance, contact Alzo Digital, CT, USA.
Asks for service & repair from ATG.

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