For many zoom lenses, the widest aperture you can get varies depending on whether you are using the wider or narrower end of the zooming capabilities of the lens. If you have only a kit lens, then the widest aperture you have may be somewhere between f/3.5 and f/5.6. The widest aperture available on a given lens is often included in the name of the lens itself. Necklace Bokeh by Archaeofrog on Flickr, shot at f/1.8 F/22: A small aperture value (smaller fraction) = a narrower opening = less light coming in = a wider depth of field (much more in focus) and a slower relative shutter speed.F/1.8: A larger aperture value (larger fraction) = a wider opening = more light coming in = shallower depth of field (much less in focus) and a faster relative shutter speed.These bullet points summarize the main points about the two opposite ends of the spectrum:
BIG APERTURE VS SMALL APERTURE FOR BLURRY SERIES
The next two posts in this series will cover the narrow-end of the aperture spectrum, in the range of f/18 – f/22, and then the middle of the aperture spectrum, in the range of f/8 – f/11. This post will focus specifically on the wide-open end of the aperture spectrum, in the range of f/1.2 – f/5.6. So I wanted to organize this series of posts around three divisions of the aperture range and the benefits and limitations of each. When I was first starting out in photography, I found it much easier to wrap my head around aperture by thinking about what each aperture category could do for me than in trying to parse out all of the values and variables and terminology. The first article in this series on aperture is called Aperture and the F/Stop Conundrum.
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