"a smaller focus" is a correct and usable phrase in written English.
You can use it when referring to a narrower scope of something: a smaller focus of attention, a smaller focus of research, a smaller focus of discussion, etc. For example, "The professor narrowed the focus of the lecture to a smaller focus on the lesser known aspects of the topic."
Much research has been carried out to improve the performance of the Fresnel lens in concentrating the sunlight, which will result in a smaller focus area.
Misterb&b is another good example of a startup branching out from an industry-leading tech company with a smaller focus.
A baraza gathering might not lend itself to hearing from every participant or to collecting in-depth responses from any one participant in the manner of an individual interview or a smaller focus group.
LORETA [ 28] performed on the grand mean (N = 13) of the difference-wave (ERP responses to rotated minus standard words) in the N1 latency range (start 160, duration 20) showed a strong focus of activity in the right occipital lobe (BA 18) and a smaller focus in the left inferior occipital gyrus (BA19), as reported in Table 1.
Mr. Bush has repeatedly asserted that his proposed $1.3 trillion tax cut will do far more for the middle class than Mr. Gore's proposal for a smaller, focused tax cut.
A smaller, focused ontology is also easier to interpret and extend with new concepts, relations and definitions.
It might matter right now, if a small focus group conducted around Sunday's talk shows by a Republican pollster, Frank Luntz, is any indication.
Your prize is a six-pack, a small focus group of Germans and a cosmic optimism that only theism could justify.
(Emerson, "Experience") E. Her lyrics at times adopt a strange, tin-eared unsuppleness, as if they'd been composed by a small focus group of Germans.
In the fall of 2015, he pitched the idea to a small focus group of about 100 people.
225 kV and a small focus 0.4 mm with 800W and a large focus of 1 mm with max.
