IR and image sharpness help.

Hi guys,

Recently installed Hikvision dvr system.
Turbo.
Along with 4 x 2.4mp dome camera's.

Issue im having is the image doesnt seem as sharp as i would like.
Im quite savvy when it comes to IT, but going through the on screen system menu offers little.
Adjusting sharpness doesnt help. In the PTZ section, focus doesnt adjust.

The image isnt to bad, just not as sharp as i would expect.
Have set to 25fps but not adjusted any other settings.

I have a cheaper system with 1mp cams and the...

IR and image sharpness help.