How to Make
a Long Throw LCD Projector
Sometimes it is necessary to extend the throw length of an LCD projector
while keeping a small image size. This can be done if an approbate
lens is obtained. unfortunately the available lenses may not cover
My approach is to look carefully at the LCD projector specifications and
find one with a element size equal or less than the size of
a 35 mm film slide. In this case the lens from a
35 mm camera can be used. 35 mm lenses come in huge variety
of focal lengths. I used an Epson projector.
Furthermore the process of mounting the lens can be enhanced if rather
than mounting a lens you mount the lens mounting ring from a 35 mm camera.
This allows you to mount any of the available lenses In my case
I choose Pentax cameras and obtained a ring from a broken Pentax camera
body. Broken cameras sold for parts are available cheap from Ebay.
All that is left is to remove the existing lens, replace it
with a plate on which the mounting ring is secured and attach the lens of