dear friend, although your question is not quite clear in here, i'm assuming that you have difficulty focusing in low light conditions when using lenses of (ultra) wide angle focal length, right?
if so, i'd suggest you forget about focusing precisely altogether with such lenses that have great depth of field already, even when shooting @ their widest open apertures.
unless you want to go for close ups of people or other objects, there's no urgent need for focusing accurately with such lenses really, especially when shooting action. just adjust the focus @ what i'd call a 'nodal point', making use of the lens's depth of field table that's usually printed on most lenses. set the focus where it gives the minimum depth of field @ the maximum aperture of say 2.8 or 4.5 or whatever the lens has.
now, just adjust your exposure, with both shutter speed (which you may need to be more careful about when doing action) as well as the aperture, without worrying much about the focusing, especially when taking long to medium shot pictures of people or objects and scenes of all kinds, where you are often times standing so far enough from the closest subject as to have them sharply in focus anyway.
i used to the same trick with my F:4.5 / 20mm SMC Takumar lens, a screw thread one, attached to my Pentax MX, a K-mount camera, using the screw-in to K-mount adapter.
the lens gave great depth of field from 1.5 metres to infinity even at its widest aperture of F4.5. when shooting action with that lens, i normally rotated the focusing ring in a manner that its infinity marking was set on the 4.5 aperture marking on the lens's DOF table. that gave me the 'nodal' point mentioned ...
all i had to do, was to concentrate on the exposure through adjusting the shutter speed and aperture, while leaving the focusing untouched. of course, whenever there was good lighting available, i would be lucky enough to have both higher shutter speeds to freeze the action as well as smaller apertures to have even more depth of field, giving me extra sharpness most naturally.
hope the above can help you with your problem here.