Weak or washed out colours are said to be under saturated. The higher the figure the better. For instance, connecting two Panasonic edit VCRs via their synchro-edit sockets will provide frame accurate editing nine times out of ten. Other makes might not be that accurate. They may be bought as a separate item but an increasing number of Edit VCRs have them built in.
Some lenses move to vary the focal length and change the image size.
Others remain static to maintain focus.