Gil,
If you mean an 8 camera frame multiplexer, most multiplexers (that ive used) will allow you to add cameras to the screen format, although it will reduce each individual cameras picture size on the screen. I believe the newer systems will allow up to 16 cameras to be viewed simultaniously on the screen. For your uses, you should be able to use just about any VCR that is compatible with a multiplexer, and has adjustable speeds. Like a previous person said, the local businesses are your best bet with this. If you have one near by, try Stop and Shop. Surprisingly enough, most of their bigger stores have some of the most up to date equipment. I used to work for them, and they will be more than happy to help you with your needs. Good luck.
If you mean an 8 camera frame multiplexer, most multiplexers (that ive used) will allow you to add cameras to the screen format, although it will reduce each individual cameras picture size on the screen. I believe the newer systems will allow up to 16 cameras to be viewed simultaniously on the screen. For your uses, you should be able to use just about any VCR that is compatible with a multiplexer, and has adjustable speeds. Like a previous person said, the local businesses are your best bet with this. If you have one near by, try Stop and Shop. Surprisingly enough, most of their bigger stores have some of the most up to date equipment. I used to work for them, and they will be more than happy to help you with your needs. Good luck.