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DPChallenge Forums >> Current Challenge >> Double Exposure for Dummies
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 04/21/2010 01:37:35 AM · #1
I love the challenge idea of double exposure. However, if you do not have a feature on your camera for double exposure, how is it achieved? I know there are many techniques, what is your favorite technique, and why? Thanks in advance for the comments.
 04/21/2010 01:43:52 AM · #2
I think the two basic techniques both involve using a long or "bulb" (if available) exposure, and either:

• covering the lens with the cap or opaque cardboard (if in a lit environment)

• firing an external flash multiple times with the lens open (in a dark environment)

Change the scene somehow between exposures.
 04/21/2010 02:00:35 AM · #3
When this came up I thought of Daniel AKA Graphicfunk, who used all sorts of clever devices to get double exposures in basic editing


I do miss that bright light from Jersey City, he was a gracious presence and a valued commenter, not to mention a very creative photographer.

Message edited by author 2010-04-21 02:02:50.
 04/21/2010 02:04:26 AM · #4
Ironic that this challenge came up. There was an image at my photo club meeting tonight where there were two "ghosts" in the image. While it was quite obviously 'shopped a couple of members I was speaking to thought that that would be the only way to pull it off. I explained how it could be done in camera and with one exposure and I believe that the wheels started turning in some peoples heads...

Now of course I can explain it but can I actually do it in practice? I guess we'll have to see. :)

edit: oops...the how

Long exposure of say 10 seconds. The person is only in one spot for 5 seconds and then moves (quickly) to the second position. The overall scene is exposed correctly however where there is ambient hitting the sensor in the same spot as the person making them appear transparent.

Message edited by author 2010-04-21 02:08:03.
 04/21/2010 02:10:19 AM · #5
Originally posted by njsabs:
I love the challenge idea of double exposure. However, if you do not have a feature on your camera for double exposure, how is it achieved? I know there are many techniques, what is your favorite technique, and why? Thanks in advance for the comments.


If you do have this feature on your camera you can't use it in basic editing :(
So we are pretty much limited to night shots. Boo

Message edited by author 2010-04-21 02:18:40.
 04/21/2010 02:18:50 AM · #6

Black Room
13 sec exposure
Flash fired twice
 04/21/2010 02:30:26 AM · #7
Originally posted by marbo:

If you do have this feature on your camera you can't use it in basic editing :(
So we are pretty much limited to night shots. Boo


Take a picture on a sunny day into a window without a polarizer.

Use an ND filter and use your hand or lens cap as the exposure control.

I can think of a third, but Im planning on using that one ;)
04/21/2010 02:46:12 AM · #8
Originally posted by BrennanOB:
Originally posted by marbo:

If you do have this feature on your camera you can't use it in basic editing :(
So we are pretty much limited to night shots. Boo


Take a picture on a sunny day into a window without a polarizer.

Use an ND filter and use your hand or lens cap as the exposure control.

I can think of a third, but Im planning on using that one ;)


If I ask really, really nicely will you share. ;P
 04/21/2010 05:15:48 AM · #9
Originally posted by BrennanOB:
Originally posted by marbo:

If you do have this feature on your camera you can't use it in basic editing :(
So we are pretty much limited to night shots. Boo


Take a picture on a sunny day into a window without a polarizer.

Use an ND filter and use your hand or lens cap as the exposure control.

I can think of a third, but Im planning on using that one ;)


I will give you the ND option, but It will have to be a very dark filter to get enough time.
I've got a 10 stop one but I doubt many people here have.
Iso 10 would be handy.

Message edited by author 2010-04-21 05:17:29.
 04/21/2010 06:26:12 AM · #10


20 sec exposure in the dark. Fire one flash, move and fire the second.
 04/21/2010 06:53:04 AM · #11

Multi-flash, move head, remove mask, double flash staying still.


Flash one... flip tripod stand to portrait, flash two.


Three different cans in different states. Swap out between flashes.


Flash once with black foamboard covering the box and top area. Drop foam to cover opening below, crawl behind and get my leg up through the bottom of the box... flash two.


Flash, move clock. Flash move clock. FLash move clock.


Flash move me. Flash move me. Flash move me. :)
 04/21/2010 10:32:46 AM · #12
So, to keep in the rules, we need to do what appears like a double exposure using a single exposure?
And for those without multiple external flashes, and cameras without a bulb setting (or with a bulb setting, but no way to keep the shutter open while flipping the tripod, moving from one place to another, etc.) - any suggestions for them (besides entering "Fashion")?
04/21/2010 10:44:34 AM · #13
Originally posted by dtremain:
So, to keep in the rules, we need to do what appears like a double exposure using a single exposure?
And for those without multiple external flashes, and cameras without a bulb setting (or with a bulb setting, but no way to keep the shutter open while flipping the tripod, moving from one place to another, etc.) - any suggestions for them (besides entering "Fashion")?


I think you have a 30 second exposre in Manual or TV mode. Should be enough time.
 04/21/2010 10:54:44 AM · #14
Originally posted by dtremain:
So, to keep in the rules, we need to do what appears like a double exposure using a single exposure?
And for those without multiple external flashes, and cameras without a bulb setting (or with a bulb setting, but no way to keep the shutter open while flipping the tripod, moving from one place to another, etc.) - any suggestions for them (besides entering "Fashion")?


Remember... nothing that is black gets recorded. So if you replace where an item was with black, it won't get overwritten.

The key to these is long exposure times in complete darkness.

You can use a single external flash too, just need a remote trigger or hand held and press the test button in your various poses.

Or shoot Fashion. :)
 04/21/2010 07:02:49 PM · #15
Originally posted by njsabs:


If I ask really, really nicely will you share. ;P


ill give you a hint, it involves smoke and mirrors, the see through kind that becomes mirrored on which ever side the light comes through
 04/22/2010 10:18:03 AM · #16
Do you believe tripple or higher# exposures are OK for this challenge or is it restricted to double?
 04/22/2010 10:26:37 AM · #17
I'd say just double - definitely.
 04/22/2010 10:31:41 AM · #18
Originally posted by duartix:
Do you believe tripple or higher# exposures are OK for this challenge or is it restricted to double?


If you're in the DPL, then by ALL MEANS do a triple or quadruple exposure :)
 04/22/2010 10:31:53 AM · #19
Yeah, stick with two unless you are OK with getting pounded.
 04/22/2010 10:37:46 AM · #20
It can be done with a tripod and flashlight. This is basic edited.

04/22/2010 11:00:31 AM · #21
does it have to be one shot, or can it be two individual?
 04/22/2010 11:12:05 AM · #22
Originally posted by hojop25:
does it have to be one shot, or can it be two individual?


Only one... By even advanced rules, two photos combined cannot have different subjects or changed subjects. (to my understanding)
 04/22/2010 04:52:07 PM · #23
These are some nice shots.
 04/22/2010 04:57:26 PM · #24
Originally posted by BrennanOB:
When this came up I thought of Daniel AKA Graphicfunk, who used all sorts of clever devices to get double exposures in basic editing


I do miss that bright light from Jersey City, he was a gracious presence and a valued commenter, not to mention a very creative photographer.


I agree, he is/was a good person here, now he is somewhere else being creative:)
 04/22/2010 05:06:03 PM · #25
Originally posted by HawkeyeLonewolf:
Originally posted by hojop25:
does it have to be one shot, or can it be two individual?


Only one... By even advanced rules, two photos combined cannot have different subjects or changed subjects. (to my understanding)


Thanks
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