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 Post subject: Nikon D90 + TTL
PostPosted: Sun Nov 28, 2010 8:47 pm 

I got my SB-600 for about 6 months and I'm finally gonna tell about something that really annoyes me a lot!

Here are some pictures I made:


Exposure 0.017 sec (1/60)
Aperture f/2.8
Focal Length 50 mm
ISO Speed 1600


Exposure 0.125 sec (1/8)
Aperture f/5.6
Focal Length 26 mm
ISO Speed 800


Exposure 0.033 sec (1/30)
Aperture f/5.6
Focal Length 32 mm
ISO Speed 400

As you can see they are all overexposed...
All 3 pictures we're taken with my SB-600 at 45° and with aperture priority
The flash was always on TTL.

Now my question is: why are they overexposed? What did I do wrong or is there something wrong with my flash?

Thanks in advance

- Joren

 Post subject:
PostPosted: Sun Nov 28, 2010 9:51 pm 
Hi Joren,

yes, the faces are overexposed for sure. No, it doesn't necessarily mean that there is anything wrong with your flash.

There can be several reasons why they are overexposed:
1) The metering: You can try to change to center-weighted or spot and make sure it meters on their faces.
2) Exposure bias: Do you have your camera at a positive exposure bias? In my experience, most Nikons benefit from a negative exposure bias -0.3 or -0.7. However, that is a will not explain this level of over-exposure.
3) Do you have flash-compensation ON, on your flash itself perhaps? I.e. a power-ration over 1?

Good luck with the diagnostics!

Cheers :-)

 Post subject:
PostPosted: Sun Nov 28, 2010 11:49 pm 
Thanks for your fast reply LahLahSr.

1) I also tried center-weighted (and had almost the same results), but if I change my sharpnesspoint does that center that dertermines the amount of light to enter, move with it?

e.g.: Like when I set my sharpnesspoint to the right, does it determines the light that's around that sharpnesspoint?

(I got no idea how to say this in an other way:) )

3) Flash compensation was off, it was neutral.

 Post subject:
PostPosted: Sat Dec 04, 2010 1:17 pm 

I had to shoot some pictures 2 days ago and I have to say that spot metering worked the best for me.. I really thought that this was only used to make pictures from e.g. a heron (which is kinda white).

There still were some incorrect exposures, but most of them were pretty fine!

So thanks for that mate!

Grtz Joren

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