On a morning walk after an overnight rain, I found these next to neighborhood mailboxes.
A gray, over cast day with its soft, diffuse light makes an easy exposure. My eight year old Tamron 28-75/2.8 lens lets me focus as close as 12″. That’s 12″ to the film plane or sensor in the camera. At that distance, wide open at f2.8 and zoomed out to 75mm. a Depth of Field Calculator said my DoF was .05″. At 16″, it was .1″ DoF. I believe that because I had to back up a little, it was very thin to hand hold.
My intent was to just get an edge or a hint of focused color and rain and let the background go soft with high contrast, to isolate the single blossom from the background. The mulch & mailbox posts share none of the elegance of the roses.
These are really a sketchpad, serendipity. More carefully made versions would involve a tripod, remote release and Mirror Lock Up with a multi second delay. And maybe some lighting. This is the large news print pad, Conte crayon version but that’s where you learn to draw.