what size lens for my den

[trook]

I am considering the Hikvision 2432 cube for my den. The dimensions are 20x25. If I get at the right angle, I can also cover my foyer which makes the dimensions 20x35. Considering the dimensions, what lens do you think would be the best..... the 2.8mm or 4mm?

 

[Larebear]

This CCTV Lens calculator may help. I've always preferred the 2.8mm lens for my 2432 cameras.

http://polarisusa.com/lens-calculator