expose inside and outside at the same time

[pads69]

I am trying to get the the inside and outside exposed at the same time
with my flash how does this look or could I get some advise?
this pict is just practice so it is straight out of camera.

having a hard time getting both right at same time.

http://i271.photobucket.com/albums/jj144/pads69/IMG_0175_edited-1.jpg?t=1236798780

[msowsun]

Use HSS (high speed sync) and increase the shutter speed to something 1/500 or as high as you need to go.

[Wilt]

Just like trying to shoot flash and the room ambient light...but can be more difficult because of the relative intensity of the outside!

Imagine outside meters 1/200 f/16 (Sunny 16, ISO 200). Assuming your flash at f/16 can reach far enough at max power output, you simply have 1/200 f/16 and use ETTL.

Imagine outside meters 1/800 f/16 (Sunny 16, ISO 800). First, you cannot shoot with your flash (ignoring the ability to shoot with HSS mode) faster than 1/200 or 1/250 depending upon your camera model , so you have to readjust your shutter by +2EV to get 1/200, then you need to adjust your aperture by -2EV to offset the slower shutter and get same exposure, or f/32 -- Problem! Solution: change camera ISO to 200 and follow the instructions in preceding paragraph.

[tim]

Wilt has it spot on. To put it another way treat it like any backlit situation - expose for the background, flash to fill the foreground. You might need studio flash to get enough power to light a whole room if it's sunny outside, or just shoot near sunrise/sunset.

[pads69]

Just like trying to shoot flash and the room ambient light...but can be more difficult because of the relative intensity of the outside!

Imagine outside meters 1/200 f/16 (Sunny 16, ISO 200). Assuming your flash at f/16 can reach far enough at max power output, you simply have 1/200 f/16 and use ETTL.

Imagine outside meters 1/800 f/16 (Sunny 16, ISO 800). First, you cannot shoot with your flash (ignoring the ability to shoot with HSS mode) faster than 1/200 or 1/250 depending upon your camera model , so you have to readjust your shutter by +2EV to get 1/200, then you need to adjust your aperture by -2EV to offset the slower shutter and get same exposure, or f/32 -- Problem! Solution: change camera ISO to 200 and follow the instructions in preceding paragraph.


let me see if I understand
1st set my iso to 200
then shutter to 1/200
then my apture to?
then what to set my flash at
ok Im lost

[msowsun]

In your photo above you had ISO 100, 1/200, and f/9

Your background is only a little overexposed so using ISO 100, 1/250, and f/11 might do the trick.
Don't worry about setting anything on the flash. That's what ETTL is for. It does it all for you. You just need to set up the camera to properly expose the outside. If 1/250 isn't fast enough, you need to enable HSS so you can shoot faster than 1/250.

You can use ISO 200 if you want, BUT if set your ISO to 100, it will be easier to darken the background.

Just enable HSS and increase the shutter speed a little at a time until you get the effect you want. It really is that easy! :)

[pads69]

Wilt has it spot on. To put it another way treat it like any backlit situation - expose for the background, flash to fill the foreground. You might need studio flash to get enough power to light a whole room if it's sunny outside, or just shoot near sunrise/sunset.


ok let me see if I can get this right meter for the background then turn on my flash and set to manual and shot until and adjust until foreground is exposed correct.

[msowsun]

ok let me see if I can get this right meter for the background then turn on my flash and set to manual and shot until and adjust until foreground is exposed correct.

Correct, except leave your flash in ETTL, unless you like messing around with manual flash power.

[pads69]

In your photo above you had ISO 100, 1/200, and f/9

Your background is only a little overexposed so using ISO 100, 1/250, and f/11 might do the trick.
Don't worry about setting anything on the flash. That's what ETTL is for. It does it all for you. You just need to set up the camera to properly expose the outside. If 1/250 isn't fast enough, you need to enable HSS so you can shoot faster than 1/250.

You can use ISO 200 if you want, BUT if set your ISO to 100, it will be easier to darken the background.

Just enable HSS and increase the shutter speed a little at a time until you get the effect you want. It really is that easy! :)

thanks I will try both ways tomorrow
yours first:)

[pads69]

Correct, except leave your flash in ETTL, unless you like messing around with manual flash power.

so leave it in ETTL and adjust with the FEC?

[Wilt]

let me see if I understand
1st set my iso to 200
then shutter to 1/200
then my apture to?

...what your meter says!

I used the Sunny 16 rule -- 1/ISO f/16 -- as an example of outside sunlight brightness exposure. If it were cloudy outside it might have read f/8 instead, at 1/ISO shutter speed.


then what to set my flash at
ok Im lost

Think of 'two exposures in one'...the ambient light, and that flash-lit part. So meter the outside and use that to determine the f/stop + shutter speed combination to expose the outside correctly. The use the flash to output the right amount of light while under ETTL control...you only have to make sure the shutter speed is not faster than what is permitted by the flash (max X sync speed)

[msowsun]

Yes, use ETTL. Then only use FEC if you need to make minor adjustments.

The flash will only illuminate the foreground. It doesn't have the power or range to reach outside.

The sun is illuminating the outdoors and you must set up the camera to properly expose for the sun.

The flash doesn't care what you set on the camera. It will use it's wonderful ETTL to give you exactly what you need to light up the foreground only.

[msowsun]

All these numbers are making this much more complicated than it needs to be.

1) Go outside and take a nice picture without the flash. Just make sure your shutter is set 1/250 or less, or you will have to enable HSS.

2) Come inside and use the same settings, but this time add the flash on ETTL.

[pads69]

thanks for all the help eveyone

[tim]

Don't use HSS, and keep your shutter at 1/200th or below. HSS means you lose a lot of flash power, and you need all you can get.