You certainly have the equipment.
I think you could try to shut down your aperture and increase your exposure time. This should give you a greater 'depth of the field' in focus.
You have F8 on that lens. Try some shots at that setting. Focus point is important, can you use it in manual at a central point? You will need good outdoor natural light and probably timer release on a tripod for a longer exposure.
Just my 2c.
These were taken with my P & S Sony N2. F 8 - 1/500s - ISO 160 - hand held.