Greater depth of field. That's what I want for my macro pictures.
So, focus bracketing with a close-up filter attached was one of the first thing that I tried when I first got my Olympus Pen EPL-9 camera and Olympus M.Zuiko ED 40 - 150mm R zoom lens. Tried a few takes and I was disappointed. The results that I got then was unimpressive. I was confused and I wrongly assumed then that the close-up filter combination with the zoom lens doesn't work. How wrong was I. It does works, albeit with some limitations.
The focal length must be between 40mm and 80mm, and ideally, the subject should be at least 25mm across in size. Beyond the 80mm focal length or if the subject is too small (like a lady bug that is 5mm across), the pictures will be unimpressive.
I haven't tried but with a Raynox DCR-250, the focal length range should be less because of its higher magnification capabilities. Maybe between 40mm to 70mm. Again, I haven't tried.
I stumbled upon this find accidentally earlier this month. Not sure why but when I saw this colpacampsomeris indica wasp (thanks to bob296 at iNaturalist for identification) resting on a leave in the cool 8 A.M. morning air, I turned the dial on the camera to AP mode, selected Focus Bracketing, and I clicked away. And the outcome (after much editing because it was shot handheld) was this:
Sorry for the Dreamstime watermark. The picture was too good to not submit it as a stock photo. For a closer look of this picture at Dreamstime, click here. And oh yeah, I wasn't stung by this wasp.