Real world differences between these two lenses?

[Sifter 0]

How much difference is there between these two F stops in a real world environment?

 

Also, will I really notice a difference between 2.8mm and 3.6mm in a QCN7001B?

 

Im referring to these two lenses from M12.

 

http://www.m12lenses.com/2-8mm-F2-0-Mega-Pixel-CCTV-Board-Lens-p/pt-02820mp.htm

 

http://www.m12lenses.com/3-6mm-F1-8-Mega-Pixel-CCTV-Board-Lens-p/pt-03618mp.htm

[Kawboy12R 0]

F-stops no, but there'll be quite a noticeable difference in the fields of view and "zoom" of a 2.8 and 3.6mm lens.

[thewireguys 3]

3.6 = AOV of 85

2.8 = AOV of 92

 

with a 1/3 sensor

[Sifter 0]

Ive seen several posts where people have tried the 3.6mm with my camera, but has anyone tried the 2.8mm? Any shots available?

[MaxIcon 0]

Here's a basic field of view calculator. There are lots more out there.

 

http://www.pelco.com/sites/global/en/sales-and-support/downloads-and-tools/tools/lens-calc.page

[Stanislav 0]

Ive seen several posts where people have tried the 3.6mm with my camera, but has anyone tried the 2.8mm? Any shots available?

 

Here is expected difference between f=2.8mm/F2.0 and f=.3.6mm/F1.8 in low light. When the light is sufficient there will be no difference in contrast and noise.

 

f=2.8mm/F2.0

 

f=.3.6mm/F1.8