k10 d multi exposure question re ghosting images

I am sure this is me being dense, but why when using the multi exposure mode do people who move appear ghost like? how do you take a photo of a scene then again with a person in it and get them to come out as clearly as the background?
I have read articles re water effects that I understand and using the feature to take several short exposures rather than one long one and the benefits of doing this but how to get a pair of me in a photo that is not ghostly eludes me.
Alistair
K10d and K-m and way to many lenses and gadgets.

the principle is simple....
you are effectively taking a proper exposure and dividing it by the number of frames you intend to (think of a 'stack') take.... for example 2 frames= each exposure divided by (underexposed) half... to get two shots of a person to expose properly, you need to
a) get them to hold perfectly still for both shots (or more) which is not easy..
or
b) light them to get a proper exposure for one shot, then remove them or keep them in the dark for the other exposure...

Don, thanks for the almost instant reply, I hardly had time to make a cup of coffee before my pc "pinged" to tell me a email had arrived.
So if I take the first shot with for example me ij it then the subsequent ones with out me it will not ghost? is that correct?
but then how do I get the "twin" effect that i have seen? in one image there was a boy who moved several times running which froze him in differnt position on the image but he was fully exposed and the back ground was also as well,?
Alistair
Never Play Leapfrog with a Unicorn.

On a multiple exposure, each object/subject that is moved will appear translucent. The only way to do what you want is in post processing. You can do it very easily in Photoshop Elements or Paint Shop Pro using masks.

Yves, thanks, I have come to realise that, never mind, in the course of the research into this I have found other uses for the ME feature that are not mentioned in the Pentax hand book or I gather some of the other books on the K10
Alistair

can be done in camera... try covering half the frame with a black card over the lens for one PRoper exposure, then place it over the first half of the frame for the second exposure..
or if your image is dark over all, place your subject on one side, and use flash to light the subject, then move the subject to another spot in the frame for the second exposure...
the trick is to use full flash exposure on your subject, and half expose the static parts that will get exposed twice...

can be done in camera... try covering half the frame with a black card over the lens for one PRoper exposure, then place it over the first half of the frame for the second exposure..
or if your image is dark over all, place your subject on side, and use flash to light the subject, then move the subject to another spot in the frame for the second exposure...
the trick is to use full flah exposure on your subject, and half expose the static parts that will get exposed twice...

It can be done that way, but you always get some light that "leaks" into the covered part of the lens/sensor, doing some softer pictures. Easier in post. I generally try to get it right in camera, but this is one case where you want to get it right in post.

Can you do multi exposure with the K10D?

Yes.

How? I would be interested to know. Thanks

In the "record mode" menu, just go to "multi-exposure", and "fill the blanks". Once you know where to look, it is self explanatory. Have fun.
(I can't be more accurate, since I sold my K10D, and those info are "off the top of my brain").

thank you

Page 166 in the manual.