Hi all

Not sure if I posted in the right spot but my question is in regards to optics and projection. To make a little less confusing I will try to explain my dilemma.

I have a triplet lens out of an old crt projector where the rear focal point is about 10mm form the rear lens surface. So to use for an lcd projector i would have to use an LCD the same size or smaller than the lens diameter.

My questions are.

If I want to use a larger lcd panel what type of lens would I put between it and the existing triplet to essentially shrink the image size so that it would act like a smaller lcd at the focal point?

And would the triplet correct the chromatic aberration from the new lens inserted (that is assuming there is some of course) ?


Thanks in advance

Christian