Overexposure


brlcc

New Member
Jan 9, 2010
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#1
Hi Guys,
Would like your kind advise on this photo. I am using f1.8 at ISO200 with 1/12s with external flash. The shoot was in a resturant with yellow lightning. Why is the photo overexposed? The flash was facing up towards the ceiling at that point of time. Am I too near to subject?
Thanks in advance.

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daredevil123

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Staff member
Oct 25, 2005
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#2
Hi Guys,
Would like your kind advise on this photo. I am using f1.8 at ISO200 with 1/12s with external flash. The shoot was in a resturant with yellow lightning. Why is the photo overexposed? The flash was facing up towards the ceiling at that point of time. Am I too near to subject?
Thanks in advance.

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what camera what flash and is your flash set to TTL? what exposure mode? what metering mode?
 

syc77

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Oct 27, 2002
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#3
Ur setting f1.8 n long shutter speed of 1/12.
Tho ur flash is bounced it will still overexpose the shot.
Try changing ur shutter to 1/125 or 1/250
 

sfoto100

Senior Member
Nov 29, 2009
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#4
u use your flash in manual mode?

if u use TTL, it should not over expose..

ur flash exposure compensation is set to zero right?
 

Rashkae

Senior Member
Nov 28, 2005
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#5
Why on earth are you using 1/12s??

I suggest you go back to the box your camera came in, look for a little book called "Instruction Manual" and start reading about "metering" and "exposure".
 

garagez

Senior Member
Dec 21, 2006
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#6
Why on earth are you using 1/12s??

I suggest you go back to the box your camera came in, look for a little book called "Instruction Manual" and start reading about "metering" and "exposure".
best advice
 

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cadefox

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Aug 18, 2010
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#7
Hmm Sorry i am also a Newbie still learning but from your situation i think is your Shutter speed that cos the over exposure. You can try adjusting your Shutter speed from 1/50 to 1/200, maybe your will get the right exporsure. Just play around with your shutter speed. =)
 

yqt

Senior Member
Sep 8, 2004
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#8
I think it is a case of shooting at f.1.8 but your flash setting is set to f.4 or f.5.6.
Do not suspect it is due to the speed of 1/12 as there is no "yellow cast" thought you mention "The shoot was in a resturant with yellow lightning"
 

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brlcc

New Member
Jan 9, 2010
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#9
Hi Guys,
Thanks for the comments so far. Pardon on my mistake, still on the learning curve.
I am using a 500D with 580 ext flash. I was using Av mode at that time, guess I
can't adjust my shuttering speed right?

Exposure Compensation at 0 and Metering Mode at Pattern.

I think I need more time on playing with the flash.. : p
 

#10
It's strange that when you're on Av mode and the camera shutter speed is so slow. Can you compare what is the shutter speed using your built in flash and external flash?

Does this condition happen all the time?
 

Abbot Man

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Aug 4, 2009
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#11
Hi Guys,
Thanks for the comments so far. Pardon on my mistake, still on the learning curve.
I am using a 500D with 580 ext flash. I was using Av mode at that time, guess I
can't adjust my shuttering speed right?
In Av mode the Shutther Speed is automatically set between 1/60 seconds (depend on camera make) and the camera’s maximum X-sync speed to match the lens aperture you have set. Maximum X-sync speed typically between 1/125 to 1/250. 1/12 seconds could be specific to Canon only.
 

dingaroo

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Dec 6, 2009
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#12
Hi Guys,
Thanks for the comments so far. Pardon on my mistake, still on the learning curve.
I am using a 500D with 580 ext flash. I was using Av mode at that time, guess I
can't adjust my shuttering speed right?

Exposure Compensation at 0 and Metering Mode at Pattern.

I think I need more time on playing with the flash.. : p
Was shooting during the Raya celebrations with family and friends using 500D and a 3rd party flash using TTL. But I always set it to Shutter Speed Priority mode, maybe because I wasn't interested in creating the blur background effect. Was using the kit lens 18-55 and the 75-300, but only problem was the face will be overexposed if picture was taken too close up and flash was set directly towards the subject.

Have you tried using Manual mode?
 

brlcc

New Member
Jan 9, 2010
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#13
I will go back tonight to test again using both the ext and build in flash and see if the shutter speed is still the same at 1/12s. At the same time will try using manual mode as well.
 

Abbot Man

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Aug 4, 2009
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#14
I will go back tonight to test again using both the ext and build in flash and see if the shutter speed is still the same at 1/12s. At the same time will try using manual mode as well.
Good idea to use Manual Mode.

A good tip for you is when using a flash is to set the Shutter Speed to your camera sync speed or slower.

Also try out Key Shifting, i.e you mix ambient light with flash light in the photo.

To do this you control the Shutter to show more or less ambient light by either slowing down the shutter or speeding it up.
 

catchlights

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Staff member
Sep 27, 2004
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#15
Camera Maker: Canon
Camera Model: Canon EOS 500D
Image Date: 2010:09:06 21:20:56
Focal Length: 85.0mm
Aperture: f/1.8
Exposure Time: 0.077 s (1/13)
ISO equiv: 200
Exposure Bias: none
Metering Mode: Matrix
Exposure: aperture priority (semi-auto)
White Balance: Auto
Flash Fired: Yes (Manual)
Color Space: sRGB
according to the exif, your flash is manual mode.

why?
 

brlcc

New Member
Jan 9, 2010
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#16
according to the exif, your flash is manual mode.

why?
Last night, I went back to take a look at my camera and flash, the flash is set at ETTL,not manual mode. Strange, something different as what EXIF have?
 

brlcc

New Member
Jan 9, 2010
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#17
In Av mode the Shutther Speed is automatically set between 1/60 seconds (depend on camera make) and the camera’s maximum X-sync speed to match the lens aperture you have set. Maximum X-sync speed typically between 1/125 to 1/250. 1/12 seconds could be specific to Canon only.
I tried with both build in flash and ext flash on AV mode. Did not manage to obtain back 1/13secs. Photos taken was at 1/30secs for build in flash and about 1/25secs for ext flash. Are these camera settings ok? This is on 85mm f1.8. Thanks.
 

GRbenji

New Member
May 24, 2010
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#20
Frankly, 1/25s and 1/30s is still quite slow.
Mind explain how you determine 1/25 and 1/30s are considered slow?

My understanding of Canon camera in Av mode is that it'll consider flash as fill light. Hence it will be metering for the ambient light regardless if flash is on or off. So the shutter speed should be the same with or without flash on. In reality however, shutter will be 1 stop faster for evaluative metering with flash on. For all other metering modes (partial, spot and center weighted average), shutter speed will be the same with or without flash.
 

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