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A good quality scaler and a lens with 2x stretch can be made to work...


Mark
 

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I am experimenting with a DIY horizontal expansion lens (see CAVX's blog--he and I and a few others have been messing around with one).


But it occurs to me that with the ability to rotate these DIY lenses, you are not restricted to just 133% stretch, but can increase it. I have a 4:3 projector that has a full stretch mode (eliminates black bars on 2.35:1 material) and have been able to get my lens to just about get the required stretch needed for constant height.


Unfortunately, I have been limited with time, and haven't been able to continue with the experiments. There is a very long thread running at www.diyaudio.com on this project.
 

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You actually want a lens with 66% stretch and then do a double whammy of "scaling" like in this shot...


Mark
 
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