x-ray effect - multiple exposure

[CNCO]

i saw an article the other day about how you take an image of something with 2 different exposures to create an x ray effect. the article was on either gizmodo or endgadget and now its not there. anyone have experience doing this or examples?

 

[Big Mike]

What do you mean by x-ray effect?

Taking multiple photos with different exposures, then combining them is often called HDR...but that has nothing to do with x-ray.

There is another technique, where you take two (or more) photos, uncovering something between exposures, then combine them to make it look like you are seeing through something...but in this case, the exposures don't have to be different.

 

[CNCO]

not hdr, i think what you mentioned second. i wish i could find the article but yes, there was an image of a brief case and then it showed the contents inside as if you were tsa looking inside.

 

[CNCO]

Gizmodo, the Gadget Guide

 

[NielsSw]

Is there any other way to do this other than in photoshop?

I have played with the same kind of effect only in the night or in a dark room and then turn on and of the lightsource to create two exposures in one picture. But you can't just turn of the sun for a second so i guess that get's a bit tricky, or is there a way?

 

[Big Mike]

Double exposure. It usually involves using a film camera and not advancing the film between shots.

As far as I know, there are very few digital cameras that allow double exposure...it's just so much easier/better to do with with Photoshop.

 

[SupNY]

Double exposure. It usually involves using a film camera and not advancing the film between shots.

As far as I know, there are very few digital cameras that allow double exposure...it's just so much easier/better to do with with Photoshop.

Ahhh interesting fact Mike, thanks for the heads up!

 

[Josh66]

Yeah, looks fairly simple. Just a plain old multiple exposure.

I know there are a few DSLRs that can do it ... Pentax & Fuji can, I think. Not sure what else.

 

[thingsIsee]

Big Mike,
those are very cool shots, never even thought of something like that. will have to try it soon.

 

[osirus]

d700 can do multiple exposure shots.
i havent messed with it much though

the other day i had an idea to combine the multi exposure with bracketing to see if i could do like an in camera hdr, but when i turned on bracketing it turns off the multi exposure setting:x

 

[Josh66]

but when i turned on bracketing it turns off the multi exposure setting:x

Just do it manually. I don't know if it will give you an HDR effect, but it would be interesting to try.

 

[Trever1t]

D300S can do it also

 

[NielsSw]

but when i turned on bracketing it turns off the multi exposure setting:x

Just do it manually. I don't know if it will give you an HDR effect, but it would be interesting to try.

Isn't it just going to be overexposed?

 

[Josh66]

but when i turned on bracketing it turns off the multi exposure setting:x

Just do it manually. I don't know if it will give you an HDR effect, but it would be interesting to try.

Isn't it just going to be overexposed?

I've never used a digital camera that could do multiple exposure, but on film - you change the ISO so that they all add up to the 'right' exposure.

Example: Say you're using 100 ISO film, and you want to do a double exposure. Double the ISO and meter normally - the two exposures will each be one stop under exposed, but they will add up to a normal exposure.

Not sure if you can change the ISO like that (without actually changing it) on a digital body. If you can't, you can do the same thing with exposure compensation. It's just easier to change the ISO (on a film body).


You would have to figure out how many exposures there are going to be, and underexpose each one by that many stops.

 

[osirus]

but when i turned on bracketing it turns off the multi exposure setting:x

Just do it manually. I don't know if it will give you an HDR effect, but it would be interesting to try.

i will play around with it when i get home from work later.