Projector using fresnel lens ?

[nosecone]

Hi all
came across this idea and even though its cheap does it work or is it just a clever con http://www.trademe.co.nz/Electronics-photography/TVs/Other/auction-404830878.htm

Cheers
Rhys

[Mike.Powell]

It produces a very dim image. The only light which can reach the projection screen must pass through the lens. Because a television or monitor is made to widely disperse light, most of the light leaving the TV/monitor screen surface will not pass through the lens. Worse yet, what light does make it through the lens is spread over a larger area than the TV/monitor screen and appears proportionately dimmer.