Foreground Render washes out background Photo I have a Photo of some work colleagues with a small table in the foreground.
I have made (in blender) a bright shinny trophy to go on the Table. 
The trophy renders up really nicely when just done as a render scene. When I try to place it on the table in the foreground with all the lighting etc it washes out the photo.
I suspect there is a simple answer I'm just not too sure what to search for.
Any help appreciated.

Cheers Willy

I have changed the picture as I can't use the original but you should get the idea.  Im using Cycles, v2.73a
I have played with some settings on the background image, its just a mesh plane with an image texture.  I really don't know how to achieve what I'm after.  To light up the rendered cup appropriately the image gets overexposed.  I presume there is some way to create a mask or filter but I haven't been able to find anything that seems to explain how this might be done. 

Image with cup in Material view


Render View


needs some work but looking good, I'll play with FoV and some more/less lighting Many Thanks :-)
I used the Node Editor and added the Emission shader between the Image Texture and the Material Output. I set the Emission shader to 0.85 this seemed to give the right balance of light to offset the lighting that I was using and mostly restored the colours in the background image.

I'll add some more lighting to match the image lighting better, adjust the Field of view, camera distance etc to get the focus looking right and match the image blur.

Many thanks for the advice.