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Aperture Blades: How many is best?

The short answer is that the more blades an aperture has, the better.  However, that short answer needs (a lot) of clarifying to be totally true. Background for Beginners You probably already know that the aperture of your lens affects depth of field. If you shoot at a wide aperture you will have a shallow depth of field. That shallow depth …

The Ideal Aperture for Landscape Photography

Whenever I teach a class on landscape photography, I can guarantee that one of the first questions asked will be what aperture photographers should use for landscape photography.  I wish it were so simple that I could say an aperture value and leave it at that.  The truth is that, for photographers who really want to improve their landscape photography, …

What is the highest aperture on a DSLR camera?

While many lenses have a maximum aperture of f/22, some lenses have apertures that go to f/40 or higher! Generally, photographers do not use any aperture above f/18 or f/22 because of diffraction.  Diffraction is a phenomenon which causes a loss in sharpness because light rays are bent around the aperture. The following is a story of when I broke …

Depth of field — it’s more than just aperture!

We all know that the aperture value controls the depth of field, but I am shocked how many intermediate photographers have never learned what other factors also impact depth of field (how much is sharp and how much of the photo is blurred).  In fact, these other factors have as much impact on depth of field as the aperture does. …