The lens fitted to the camera should be of the best possible
quality and be capable of filling the camera viewfinder with an
image of the TV/Monitor screen. It is often better if the image
is designed with a space round it to avoid showing the curved
edges of the screen.

A zoom lens is very useful here in that it`s ability to change
image size will allow framing of the screen without moving the
camera. Zoom lenses can introduce their own degrees of distortion
though, causing vertical edges to look slightly curved.




Although not necessary, I use a 90 mm. Macro lens, which is
particularly designed to work at close distances, and exhibit
high image quality and technically correct straight lines at 
those distances. A clear glass filter fitted to the lens - Ultra
Violet type - will prevent finger marks on expensive coated glass
surfaces, and a lens hood helps reduce or eliminate flare.