What has happened here ? [ photo ]

mattx · 08-11-2009, 04:58 PM

I was taking pictures this afternoon of my kids playing with their toy cars [ the ones in which crash and the doors fly open etc etc ] - anyhoo, whilst snapping away and playing with the shutter speed, this one caught my eye and I am still trying to work out what has happened.
The car was setup to go off sideways off the ramp which you can see it has but for some reason the car detail is very transparent - more of a ghost car. Anyone got any explanations ?

Details on the picture is as follows:

1/2 sec shutter
6.7 Ap
ISO 320

GrumbleDook · 08-11-2009, 06:31 PM

Because of the red blur further to the right of the image it looks like a double exposure, the first is a short one taking the car and the second taking a long one taking in the blurred car.

Something gone a bit strange with your settings?

mossj · 08-11-2009, 06:39 PM

Could it be that because your shutter speed was slow (1/2 second is quite slow).

The camera was able to take in the bridge before the car came into shot... hence it's included the detail behind the car, making it appear transparent.

http://www.freephotoresources.com/ma...ffects-part-1/

Also did you use a tripod? remaining that steady for 1/2 second is impressive!

p.s 1,000th post!

dwhyte85 · 08-11-2009, 06:54 PM

So... it's not a ghost car?

mattx · 08-11-2009, 07:04 PM

I'll go with the double exposure I think.
Not on a tripod. The other ones I took were these:

and

Different settings etc.

chrbb · 08-11-2009, 07:08 PM

Forget the picture - how tidy is your house? Remarkably tidy for a house with two small children

Also housework question- is that a solid wood floor? If so what do you use to clean it, we had solid flooring put down recently and am stumped what to use to clean it?

mossj · 08-11-2009, 07:09 PM

Quote:

Originally Posted by mattx

I'll go with the double exposure I think.

Well this photo mimicks exactly what happened and was taken using a slow shutter setting - File:Shutter speed pool.jpg - Wikipedia, the free encyclopedia

mattx · 08-11-2009, 07:13 PM

Quote:

Originally Posted by chrbb

Forget the picture - how tidy is your house? Remarkably tidy for a house with two small children

Also housework question- is that a solid wood floor? If so what do you use to clean it, we had solid flooring put down recently and am stumped what to use to clean it?

HA HA HA - you have not seen their rooms !! The floor is a solid oak floor - had it put in after we had Subsidence and moved out for 6 months.
It's a long story - lasted about 4 years so i won't bore you with it all !!
To clean - nothing more than soap and water.

A few years back now but this is a pic after they did some of the work:

And this is afterwards:

mattx · 08-11-2009, 07:16 PM

Quote:

Originally Posted by mossj

Well this photo mimicks exactly what happened and was taken using a slow shutter setting - File:Shutter speed pool.jpg - Wikipedia, the free encyclopedia

Well thats interesting as when I was taking the shots I lowered the shutter speed to try and get the feel of visual movement..... I only took that one as the missus then arrived home and we had to put all our toys away.......

webman · 08-11-2009, 07:29 PM

First one without flash, other three with flash?

mattx · 08-11-2009, 07:41 PM

All with the flash - was trying not to use it to start with but with a fast shutter speed I was getting just very dark images - even using a high ISO & open aperture. Ended up turning all the lights on and using the flash.....

capncrunch · 09-11-2009, 09:32 AM

What is you maximum Aperture? f2.8? 3.5?

For indoor without a flash you really need something like a 1.4 or 1.8 and even then you will need to crank up the ISO to avoid any motion blur.

If you wanted the look of visual momvement then panning would have done the trick with no flash and a slow shutter speed.

keithu · 09-11-2009, 09:49 AM

What you've done is usually called Slow Sync Flash. By setting a long exposure for the background ambient light and using flash for the foreground detail you end up effectively with two exposures on the same frame.

13 Great Examples of Slow Sync Flash Images

SteveBentley · 09-11-2009, 09:50 AM

The flash is the key - the flash would only have fired for a fraction of that half second exposure, so the ghost car is just where it was when the flash fired. Without the flash you wouldn't have got it at all, it would just be a blur over half a second.

broc · 09-11-2009, 09:53 AM

Does your camera have any specialist flash modes, such as 2nd Curtain Sync Flash (sometimes known as Slow Sync Flash)? Using a conventional flash setup at low shutter speeds the flash normally fires as the shutter opens but with more sophisticated features it is possible to have a 'pre-flash' as the shutter opens, followed by the main 'flash' just before the shutter closes.

It looks to me as if there may have been a pre-flash (anti-red eye?) which captured the car followed by a main flash which exposed the rest of the image.... but I am not an expert on these things

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08-11-2009, 06:39 PM	#3
mossj Join Date: Dec 2008 Location: Leicester Posts: 1,257 Thanks: 145 Thanked 160 Times in 147 Posts Rep Power: 37	Could it be that because your shutter speed was slow (1/2 second is quite slow). The camera was able to take in the bridge before the car came into shot... hence it's included the detail behind the car, making it appear transparent. http://www.freephotoresources.com/ma...ffects-part-1/ Also did you use a tripod? remaining that steady for 1/2 second is impressive! p.s 1,000th post! Last edited by mossj; 08-11-2009 at 06:49 PM..

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What has happened here ? [ photo ]

08-11-2009, 06:31 PM	#2
GrumbleDook Join Date: Jul 2005 Location: Kettering, Northants Posts: 6,331 Thanks: 245 Thanked 550 Times in 297 Posts Blog Entries: 6 Rep Power: 129	Because of the red blur further to the right of the image it looks like a double exposure, the first is a short one taking the car and the second taking a long one taking in the blurred car. Something gone a bit strange with your settings?

08-11-2009, 06:54 PM	#4
dwhyte85 Join Date: Mar 2009 Location: Berkshire Posts: 311 Thanks: 21 Thanked 33 Times in 31 Posts Rep Power: 10	So... it's not a ghost car?

08-11-2009, 07:04 PM	#5
mattx Join Date: Jan 2007 Posts: 4,692 Thanks: 189 Thanked 408 Times in 260 Posts Rep Power: 166	I'll go with the double exposure I think. Not on a tripod. The other ones I took were these: and Different settings etc.

08-11-2009, 07:08 PM	#6
chrbb Join Date: Oct 2005 Location: Midlands Posts: 1,021 Thanks: 70 Thanked 33 Times in 31 Posts Rep Power: 18	Forget the picture - how tidy is your house? Remarkably tidy for a house with two small children Also housework question- is that a solid wood floor? If so what do you use to clean it, we had solid flooring put down recently and am stumped what to use to clean it?

08-11-2009, 07:29 PM	#10
webman Join Date: Nov 2005 Location: County Durham Posts: 6,865 Thanks: 457 Thanked 372 Times in 292 Posts Blog Entries: 2 Rep Power: 117	First one without flash, other three with flash?

08-11-2009, 07:41 PM	#11
mattx Join Date: Jan 2007 Posts: 4,692 Thanks: 189 Thanked 408 Times in 260 Posts Rep Power: 166	All with the flash - was trying not to use it to start with but with a fast shutter speed I was getting just very dark images - even using a high ISO & open aperture. Ended up turning all the lights on and using the flash.....

09-11-2009, 09:32 AM	#12
capncrunch Join Date: Apr 2009 Posts: 37 Thanks: 0 Thanked 3 Times in 3 Posts Rep Power: 2	What is you maximum Aperture? f2.8? 3.5? For indoor without a flash you really need something like a 1.4 or 1.8 and even then you will need to crank up the ISO to avoid any motion blur. If you wanted the look of visual momvement then panning would have done the trick with no flash and a slow shutter speed.

09-11-2009, 09:49 AM	#13
keithu Join Date: Oct 2007 Location: Lincolnshire Posts: 86 Thanks: 0 Thanked 11 Times in 11 Posts Rep Power: 6	What you've done is usually called Slow Sync Flash. By setting a long exposure for the background ambient light and using flash for the foreground detail you end up effectively with two exposures on the same frame. 13 Great Examples of Slow Sync Flash Images

09-11-2009, 09:50 AM	#14
SteveBentley Join Date: Jun 2007 Location: Yorkshire Posts: 677 Thanks: 32 Thanked 77 Times in 59 Posts Rep Power: 21	The flash is the key - the flash would only have fired for a fraction of that half second exposure, so the ghost car is just where it was when the flash fired. Without the flash you wouldn't have got it at all, it would just be a blur over half a second.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

09-11-2009, 09:53 AM	#15
broc Join Date: Jan 2006 Location: England Posts: 1,194 Thanks: 38 Thanked 182 Times in 110 Posts Rep Power: 57	Does your camera have any specialist flash modes, such as 2nd Curtain Sync Flash (sometimes known as Slow Sync Flash)? Using a conventional flash setup at low shutter speeds the flash normally fires as the shutter opens but with more sophisticated features it is possible to have a 'pre-flash' as the shutter opens, followed by the main 'flash' just before the shutter closes. It looks to me as if there may have been a pre-flash (anti-red eye?) which captured the car followed by a main flash which exposed the rest of the image.... but I am not an expert on these things

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What has happened here ? [ photo ]