The blur can help convey a sense of swift motion in your shot. We’re often left with either an extremely sharp photo or a blurry mess (and, of course, something in the middle). Trying to tell the story of speed in your photos can be a difficult task for a lot of photographers. Try the search function.Use Motion Blur to Add a Sense of Speed to Your Sports and Action Photos. When it comes to camera settings, there've been are quite a few threads here in the forum. In your case (flowers, i.e., a larger subject a with significant spatial depth), focus variation is the better alternative because with a slide, you'd rather get too much disturbance from the varying perspective. But also at smaller magnifications, if the subject is rather flat, a slide is good. But you increasingly need an electric motor because the step width needs to become really small and increasingly controlled with increasing magnification. With > 1:1, it is probably the only method. 5:1, a slide works really well with more or less all subjects. My experience is that around a magnification of 1:2.
With focus stacking, you basically need to distingish between variation of the focus of the lens (either with AF or - rather difficult - manually) and variation of the position of camera or subject (e.g., by means of a slide again, manually or equipped with an electric motor). There are some samples in my 500px account.
I started w/ Picolay and one day bought Zerene stacker, and am happy with the latter. According to my own experience, Zerene digests the perspective disturbance effects better than Picolay. For a no cost entry, I recommend Picolay from Herbert Cypionka.
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