not afraid to modify, destroy, unscrew, hack, etc 
The main things I'm worried about is how far away i have to put it away from the lens, if it would be unfocused unless i needed a converter from 37mm to 35mm, etc.
There seriously needs to be an option to comment on other people's answers.
lare, what if i left the lens on, and just put a lens over the other lens? such as
http://blog.makezine.com/archive/2009/12/attach_a_slr_lens_to_an_iphone_with.html
 Nikon D3000 Kit with AF S DX 18 55mm Lens 102 Megap  US $390.00
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 Nikon AF S Nikkor 300mm f 4D ED IF Lens US $620.00
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 Nikon AF S 70 300 70 300mm VR Lens US $441.50
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January 7th, 2010 at 9:31 am
weld it. other than that it can’t be done.
January 7th, 2010 at 9:31 am
Well…As you know, you’re not supposed to, but basically the only way to remove the lens from the point and shoot is to rip it off, which could get quite messy, and then to attach the SLR lens you’d probably need some tape, and glue…And the results wouldn’t be too great.
Just buy a cheap SLR, the D40 is highly recommended because it’s cheap and incredibly efficient.
January 7th, 2010 at 9:31 am
Super glue, crazy glue, whatever sticks.
PS no way will it work
January 7th, 2010 at 9:31 am
ok here is how you do it:
1. get your P&S, turn it on and extend the lens
2. put the lens part on the table or some hard surface, get a hammer, and HIT the P&S lens as hard as you can, but make sure you don’t hit the body… keep hitting it till all the parts of the lens fall off
3. once the P&S lens is gone, and you have a good hole in the front of your camera, take the SLR lens and jam it into the hole real good… you have to jam it hard or it will not stay in…
4. this is the key part… you have to put some epoxy glue in between the lens and the camera, then take a blow-torch and melt the glue and the plastic together, so it stays in place…
5. operate!
good luck!!! Let us know how it works!
January 7th, 2010 at 9:31 am
by point and shoot, i hope you mean a DIGITAL point and shoot. otherwise, since the p/s viewfinder is not through the lens, you will have no idea of what the image looks like on the film. you need the p/s camera that has the LCD viewer. On a true SLR lens, there is no shutter, that is because the camera body has a mirror to keep the light off the film and the shutter is of the focal plane type. a p/s camera has a leaf shutter in the lens so figuring out how to build a focalplane shutter aperatus for your modified camera will be a challenge. and forget autofocus or even auto exposure, the p/s camera does not have the ability to couple to the SLR lens.
As to focus, the distance from the primary lens to the focal plane for an object at "infinity" is the number on the lens. The standard 35mm film camera uses a 2 inch or 52 mm focal distance lens. Set the SLR lens focus to infinity and use shims to move the mounting flange in/out until sharpest focus is acheived. Once you have done this, the SLR lens will form an image about 1.5 inches wide. However the CCD in most p/s cameras in only 1/3 or even 1/8th inch wide, the effect for even a modest SLR lens will be in the super-telephoto range. you won’t be able to take a "normal" photo.
if you can make this work, then you are the luckiest guy in the world.