I have two miniscus lenses, found within the projection unit of a 3M OHP. Does anyone have any experince with such a unit/ lenses in terms of a projection unit for the LCD?
Would it be better to get a 6-3/4" diameter ctd bi-concave lens with focal length of approx. -350mm. Edge thickness is 7/8", center thickness is 0.325? - I can get one for 35USD
Would it be better to get a 6-3/4" diameter ctd bi-concave lens with focal length of approx. -350mm. Edge thickness is 7/8", center thickness is 0.325? - I can get one for 35USD