I learned something about black-and-white with this post. For B&W images, one must find a "happy medium" between lots of depth-of-field and little depth-of-field. I have been trying to increase the depth-of-field on plant photos with a tripod for the purpose of making images that may have some value for identification purposes. But with a lot of depth-of-field and colors eliminated, sharp backgrounds easily confuse or distract the eyes because focus no longer guides the eyes toward the subject.
With too little depth-of-field, some of the subject — even with small subjects — may be out-of-focus; an example of an image with [too] little depth-of-field: http://365project.org/rhoing/365/2013-12-04
With this image, I was lucky: there is enough depth-of-field that the pitcher plant "inflorescence" is in sufficiently sharp focus but the depth-of-field isn't too great so as to have the subject get lost in a sharp background.
Retired economics professor (“dismal scientist”). Married 40+ years to the love of my life; we have two grown daughters, both married, two granddaughters and a...