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beyond_gravity
Sep 10, 2002, 12:51 AM
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How do I do this? I used my moter and took 5 shots on one frame of a dyno but it came out way over exposed. Is this basicly trail and error or is there some specail way to get the exposure right?
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farmerc
Sep 10, 2002, 1:17 AM
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hey,
if you are trying to catch the person at 5 distinct positions through the air, use a fast shutter speed, say, 1/250 or 1/500, and set a medium to small aperture like f/8 or f/11. that way your total exposure won't be too much. If you want a little bit of blur/motion with each position, set the shutter slower, and conversely make the aperture smaller.
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the_elk
Sep 10, 2002, 1:27 AM
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If you are wanting to do double exposures,
A) You're gonna have to underexpose each of the 2 shots so that it equals the correct exposure in the end result! (follow?) the more shots on the frame the more underexposed each shot needs to be.
and
B) Let's say you want a portrait of the climber and the action shot. Shoot the portrait with a black background (exposing for the skin and under-exposing a tad, and have your subject on one side of the frame (eg, the left) and then when you shoot the action shot you need to shoot the action on the right side of the frame. Ideally it'd be good to shoot it with dark background on the left for the 2nd exposure so the portrait doesn't get too mixed up with rock or whatever.
eg: portrait of climber in controlled environment, and then outdoor action shot, rock on right with dark tree's or whatever on left.
Hope that helps.
You've actually given me an cool idea, cheers. I'll work on it and see how it works out and post 'em here.
Catchya,
Elk
Edit: spelling and delete a bit of jargon. cheers
[ This Message was edited by: the_elk on 2002-09-09 18:29 ]
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toprope_media
Sep 19, 2002, 12:42 PM
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Some purists may flip out over this, but you can control double exposures extremely well by using layers in photoshop. Often, multiple exposures produce unexpected results.
Maybe that is the point?
Just a suggestions.
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cyberclimber
Sep 19, 2002, 1:09 PM
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The cheaters way to properly exposing multiple exposure shots is to manipulate your film speed setting, that way you can still use all your camera's automatic settings. For example, if you are wanting to double expose a shot on 100 speed film, set the film speed on the camera to 200, fooling the camera into exposing each exposure for half the needed time. For a triple exposure, the setting would be 400. For four exposures, set the camera to 800, for five, 1600, etc.
Your camera will need to be on a tripod so that the backgound (the rock) will be properly exposed and sharp. Realize that the parts of your subject that don't over-lap in each exposure will be under-exposed. If you are wanting every part of the subject properly exposed but also want the multiple exposures to show the movement, the only way I know of to do this is to take several normal shots and then layer them together in Photoshop.
Either way, expect lots of effort and many failures. Let us know how it turns out.
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takeit4granite
Sep 20, 2002, 5:40 PM
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I have seen in snowboard mags shots of a sequence air with up to 12 frames in the exposure. Do you do it the same way as mentioned above?
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kriso9tails
Sep 20, 2002, 6:22 PM
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If you're enlarging these images yourself then just sandwich your negs later, or if it suits your purposes double expose the print. It's the same thing, but you have better control of the process... just don't scratch them.
[ This Message was edited by: kriso9tails on 2002-09-20 11:24 ]
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drector
Sep 20, 2002, 6:34 PM
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For the snowboarder, you can just cut and paste in photoshop *if* the guy/gal never overlaps himself and the background can be lined up exactly (tripod reqd.)
Does everyone remember the Olymics where they showed two skiers runs overlapps so both guys were visible but the background looks clear and sharp. Very cool effect.
Dave
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tim
Sep 20, 2002, 7:13 PM
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look in your camera's manual -- basically you want to expose 1/2 as long for a double exposure (down 1 stop from metered at the same shutter speed), 1/4th as long for 4 frames (2 stops), 1/8th as long for each of 8 frames (3 stops), and so on...
1) use a tripod
2) think about using the ISO trick (eg. shoot Provia 100F at 400 for 4 "frames" in a multiple exposure and don't push process)
3) use a tripod, and
4) learn to compensate for your meter...
#4 is strangely more important for multiple exposures than normal, because you can't really bracket multiple frames... you have to get it right the first (, second, third, fourth) time.
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