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Old May 14, 2012, 7:43 PM   #1
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Default XSi night shots vs 5d Mark ii

I am trying to make my Mark ii do what my XSi does automatically.

I was trying to take a photo of a child at dusk, buildings and waterworks in the background.

I turned the XSi knob to night portrait. The flash jumped up, I took the photo and it was great.

I then tried to duplicate the shot using the same EXIF information and flash with my Mark ii, but the photo was not nearly as good as with the XSi.

What am I missing?

Faithfully Yours,
FP
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Old May 15, 2012, 3:55 AM   #2
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what mode were you in with the 5d
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Old May 15, 2012, 3:56 AM   #3
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also can you post both shots
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Old May 15, 2012, 8:15 AM   #4
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Default Here's the photo

Camera XSi
Night Portrait Mode
F 3.5
1/4 second exposure
ISO 400
0 step
28MM
Lens: Canon 28-135
Autofocus
Flash Compulsory.

I no longer have the image from my Mark ii.

Thanks for your help.
FP
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Old May 15, 2012, 9:37 AM   #5
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What was the FEC, (Flash Exposure Compensation) setting used on the XSi ?
The auto body mode would have automatically set something to do that in a fill flash shot.

The EXIF data seems to be stripped from the sample image, so difficult to check if the info was included in the image.

The 5d-mkii expects you to know what needs to be set for the exposure compensation and flash exposure compensation settings,
and an external flash will most likely have a lot more power than the popup on the XSi so the required settings may be quite different.
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Last edited by PeterP; May 15, 2012 at 9:40 AM.
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Old May 15, 2012, 10:11 AM   #6
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Default zero step?

Hi Steve,

Thanks for the help.

I'll try to answer your question, but I may have this all wrong. So feel free to set me straight.

I think Canon refers to FEC as Step when I look at the EXIF. Therefore, Zero Step means the camera made no FEC, or shot it without any compensation.

Could a Canon shooter (assuming Steve isn't, and he very well may be a Canon shooter) verify for me that Step and FEC are the same or almost the same function?

FP
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Old May 16, 2012, 4:19 AM   #7
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hi canon uses flash a fill in so if you set an aperture it will set the sync speed up to the max sync speed. it can also set a slow sync to. i know that on my T2i/550d i can set a cf to stop that. follow this link and it explains a lot about canon flash

http://photonotes.org/articles/eos-flash/
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Old May 16, 2012, 5:31 AM   #8
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Looks like auto "scene" modes may have some use after all...!
Saves "faffing about" when a quick shot is needed..!!
The lighting is very nicely balanced in the said photo...
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Old May 16, 2012, 9:32 AM   #9
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Quote:
Originally Posted by FaithfulPastor View Post
I then tried to duplicate the shot using the same EXIF information and flash with my Mark ii, but the photo was not nearly as good as with the XSi.
Not that surprising. The XSi/450D is a great camera. The humble Rebel
series have some great features which are not included in the high-end
models.

Quote:
What am I missing?
I suspect that the answer is 2nd curtain sync. The Canon Night Portrait
mode uses a long exposure so that the background is exposed properly
and a flash just before the shutter closes so that the subject is properly
exposed, frozen and has the correct colour balance.

Try using a relatively long exposure and set the camera to use 2nd
curtain flash sync.
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Old May 16, 2012, 1:28 PM   #10
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Description of second curtain sync is mostly accurate:
Shutter opens to expose the background, then flash fires to expose foreground subject just before shutter closes.

First curtain sync:
Flash fires to correctly expose the foreground subject then the shutter stays open to correctly expose the background.

If the scene is Static <- "big keyword here" the result will be identical. using either method.

The effect of first or second curtain sync is mainly evident when the subject is in motion. The flash will freeze the subject at either the beginning or end of the exposure, with a blurred trail either behind or in front of the subject.
Second curtain sync will put the blurred "speed" trail behind the subject.

Quote:
Originally Posted by corkpix View Post
Not that surprising. The XSi/450D is a great camera. The humble Rebel
series have some great features which are not included in the high-end
models.

I suspect that the answer is 2nd curtain sync. The Canon Night Portrait
mode uses a long exposure so that the background is exposed properly
and a flash just before the shutter closes so that the subject is properly
exposed, frozen and has the correct colour balance.

Try using a relatively long exposure and set the camera to use 2nd
curtain flash sync.
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