Hi,

When "Distance to Projection Lens" is mentioned, what does that mean precisely: as the the projection lens has some thickness - is it
A) The Distance to the beginning of glass in the lens (rear glass)
B) The Distance to the middle point between front glass and rear glass
C) The Distance to the front of the glass?

Thank you!

The distance from the lcd to the rear of the focal lens. These distances however may be different. The closer your projector is to the screen the further the focal lens will be to the lcd. If you make a focus box with a couple inches of movement you shouldnt have to worry to much.