650tvl specification and difference

What is 650tvl cctv cameras ? will a 650 and 750 tvl is much difference ? which high resolution cctv system would you recommend for 8 cameras (expandable to 16)

Thanx for any help or explanation
crescueAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

kode99Commented:
Going off just the tvl numbers alone is pretty meaningless.  If everything else was identical 750 if better though you probably could not tell the difference between 650 and 750.  In general anything above about 500 is decent.  There are other specs and features that matter much more than a small difference in tvl.  Things like light sensitivity,  dynamic range, auto iris,  day night capability.  

tvl - tv lines and is sort of like the horizontal resolution of the picture.  The vertical resolution is fixed for standard video signals - usually 525 lines on a NTSC camera which is typical in North America.  So its is sort of like the difference between a 650x525 picture or a 750x525 picture.  It's not the same as pixels but I think you probably get the idea.

In this day and age calling this 'high resolution' needs to be put in perspective with multi megapixel IP security cameras which offer much higher resolutions.

Typically the best you get with analog camera's on a DVR is D1 resolution - 704x480.  Does not stack up well vs 1920x1080 HD or higher. I wouldn't recommend getting any DVR that cannot handle D1 at at least 7 or so frames per second on all channels.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
crescueAuthor Commented:
Thanx
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Security

From novice to tech pro — start learning today.