Aliexpress Lens Size Question

[RBW]

380TVL=2.8mm lens
540TVL=4mm lens
600TVL=6mm lens
700TVL=12mm lens

Why do Aliexpress use tv lines to describe lens size?

Ta.

 

[fenderman]

380TVL=2.8mm lens
540TVL=4mm lens
600TVL=6mm lens
700TVL=12mm lens

Why do Aliexpress use tv lines to describe lens size?

Ta.

because ali does not give them the option to add lens sizes...they are still stuck in the analog age.

 

[Q™]

...Why do Aliexpress use tv lines to describe lens size?...

+1 on what Fenderman said; this is how AliExpress has setup their database. It would have been better if the developers had allowed four (3) different columns (data input fields) but also allowed their vendors to specify four (4) different labels (a different text label for each field). As it is the developer "per-labeled" each of these fields (380TVL, 540TVL=4mm lens, 600TVL & 700TVL), therefore all AliExpress camera vendors are stuck with these TVL labels.