Long exposure

potter

potter

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Adam
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Hi all,

I recently took some pictures of a friends car, and I wanted to try to long exposure shots... So in the image you can see the clouds have moved a bit, look stretched... if that makes sense, and the car is stationary

When I tried this I just got a picture back of a white light - Whats the trick to this?

Cheers

Adam
 
How long are you talking? Obviously the longer the exposure the more light the camera takes in.

If you are wanting long exposure during day light you need to purchase a filter to allow for this.

You could try setting the camera to manual and changing the exposure to a -2 then use slightly longer shutter speeds but you might struggle to get the effect you want with no filter :)
 
sduk said:
How long are you talking? Obviously the longer the exposure the more light the camera takes in.

If you are wanting long exposure during day light you need to purchase a filter to allow for this.

You could try setting the camera to manual and changing the exposure to a -2 then use slightly longer shutter speeds but you might struggle to get the effect you want with no filter :)
Click to expand...

Cheers mate, what sort of filter would I need?
 
Did you have the ISO at the lowest possible setting and the aperture at the highest possible setting?

If yes then you need an ND filter. Probably quite a strong one for getting blurred clouds in daylight - though obviously it depends how bright it is and how fast the clouds are moving.

If, for example, you were getting a correct exposure at 1/60 f/22 ISO 100 (this would be roughly correct in full unbroken sunlight) then this is what exposure settings you'd get in the same light with an ND filter fitted:
ND2 - 1/30 f/22 ISO 100
ND4 - 1/15 f/22 ISO 100
ND8 - 1/8 f/22 ISO 100
ND16 - 1/4 f/22 ISO 100
ND32 - 1/2 f/22 ISO 100
ND64 - 1" f/22 ISO 100
ND128 - 2" f/22 ISO 100
ND256 - 4" f/22 ISO 100
ND1024 - 8" f/22 ISO 100.

I'd recommend buying one that might be too strong rather than one that might be too weak as you can always increase the ISO or open the aperture more to let more light in. Bear in mind you'll lose autofocus with the stronger ND filters because there won't be enough light reaching the AF system for it to work so you will probably want to focus before fitting the filter.

You might find it easier to look at what people use for taking long exposures of water to make it smooth as it's essentially the same technique.
 
Last edited:
To get the crazy clouds moving shot you need a combination of a long exposure and a heavy ND filter.

There's a lot of those sort of shots on here (not neccesarily cars mind you) - search for "10 stop" or "welding glass"

You also need the right weather conditions to really make it work, plus a wide angle or fisheye lens...
 
DazJW said:
Did you have the ISO at the lowest possible setting and the aperture at the highest possible setting?

If yes then you need an ND filter. Probably quite a strong one for getting blurred clouds in daylight - though obviously it depends how bright it is and how fast the clouds are moving.

If, for example, you were getting a correct exposure at 1/60 f/22 ISO 100 (this would be roughly correct in full unbroken sunlight) then this is what exposure settings you'd get in the same light with an ND filter fitted:
ND2 - 1/30 f/22 ISO 100
ND4 - 1/15 f/22 ISO 100
ND8 - 1/8 f/22 ISO 100
ND16 - 1/4 f/22 ISO 100
ND32 - 1/2 f/22 ISO 100
ND64 - 1" f/22 ISO 100
ND128 - 2" f/22 ISO 100
ND256 - 4" f/22 ISO 100
ND1024 - 8" f/22 ISO 100.

I'd recommend buying one that might be too strong rather than one that might be too weak as you can always increase the ISO or open the aperture more to let more light in. Bear in mind you'll lose autofocus with the stronger ND filters because there won't be enough light reaching the AF system for it to work so you will probably want to focus before fitting the filter.

You might find it easier to look at what people use for taking long exposures of water to make it smooth as it's essentially the same technique.
Click to expand...

desantnik said:
To get the crazy clouds moving shot you need a combination of a long exposure and a heavy ND filter.

There's a lot of those sort of shots on here (not neccesarily cars mind you) - search for "10 stop" or "welding glass"

You also need the right weather conditions to really make it work, plus a wide angle or fisheye lens...
Click to expand...

Thanks a lot for the replies... seems I need to invest in a filter when I can...
Cheers
 
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