Triplets make images larger, is there a lens to make an image smaller?

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opo terser

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Joined 2005
#1
I have a problem, my projected image is too large at the distance I need to put my ohp/panel setup from the wall.

I know flip-in triplets on ohps make the image slightly larger, but is there some sort of lens too make the projected image slightly smaller?
 
#2
It is not that all triplets make the image bigger when compared to other types of lenses. It is the focal length. Any type of lens can have different focal lengths. If you want a smaller image you need a longer focal length lens.

OHPs in particular tend to have short focal length lenses, or about 300mm give or take.
 
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