I'm about to do a ME shot on my motorcycle. The first shot will be with no bodywork, and the second shot with it on. So it will look transparent like a shot you would see in a magazine. I have two questions actually.. 1. Do I take both shots at the same exposure, or slightly overexpose the second shot? It'll probably inside my shop under florescent lighting.
And #2...how long will a Nikon N80 (35mm)stay "active". It'll take around an hour to get all the bodywork bolted on, will I even be able to take this multiple exposure? Or will the camera turn itself off?
It's been years since I tried it, but I think the formula is 2 exposures at 1 stop under, 4 exposures at 2 stops under and 8 exposures at 3 stops under. But I would also suggest trying different combinations and keeping notes on what you do so it can be duplicated.
same here.....been awhile,.... I KNOW the two exposures at one stop under(per exposure) is accurate...
no matter what ( you already know this).. there will be a LOT of experimenting to get it right
if you are considering something important and very time consuming then you owe it to yourself to experiment with some "stand in" subject....to perfect your lighting and exposure. You will have enough experimenting to worry about in the case of subject placement etc without worrying about exposure
I am not familiar with your specific camera to be able to answer your question regarding how long your camera will stay on....
I will second the opinion that it's one stop under for two exposures.
I will also reinforce the idea that you should practice the double exposure technique on something that won't take so long to assemble / disassemble. Maybe a series of small / large objects on a countertop or something else that would allow you to see if the effect your going for will even work.
As far as how long the camera will stay "on", I'd suggest turning it on, write down the time and then check back on it every five minutes. Far easier that trying to get the body work on / off the motorcycle only to be almost done and have it shut off.
...or you could use a Holga, they never turn off... 
Have fun.
![]()
| Cameras Other | Techniques Site Features | Blogs Archived Blogs Refreshers | More Articles | Columns eCommerce | News Resources |


.jpg)

.jpg)
