I love walking around with a Macro lens. Getting up close and personal with the small things I see in my world.
When you look through the viewfinder of any image that you are shooting, you decide some things, like what you want to include in the frame. A Macro, because it is looking at such a small thing has already eliminated 99.9% of the world around you. You have chosen to focus on the tiny bit of the world that has captured your attention. Now what?
One of the very cool things about a Macro lens, that all photographers know, but that many people who take pictures do not know, is that a Macro has an incredibly narrow depth of field. Depth of field is the photographic term for the range of acceptable focus where the images seems to be sharp, or is sharp enough to be called, “in focus.”
Any lens has a specific focus. Period. But, our eyes cannot tell the difference between super sharp focus, and really good focus, or even just good focus. …
|Depth of Field Indicators|
Sometimes we get a little help from the lens manufacturers. You will notice the difference on these two len’s barrels. …
The top one is an 85 mm portrait lens, and the indicators are, in green feet, and in white meters, and the list at the bottom is the f-stop of acceptable focus. … You can see that in the 85 mm lens, at f16, is about 7 feet to 13 feet from the focal plane of the camera.
While the acceptable range of focus on the 180 mm Macro, focused for a 1to1 macro is so tine as to be indiscernible, just looking at the lens.
So, in any photo you also can limit what is in the frame with acceptable focus. That focus limitation, or strength, depending on your application, is exaggerated when shooting a Macro.