Olympus Sigma Lenses Four Thirds System

Blurring Background with Large Aperature Lenses

A blurred background is useful in making your subject stand out from its surroundings. Bokeh is a term that describes the quality of the blurring.

To achieve “good” bokeh in a photograph, the lens aperture is used wide open as the lens is precisely focused on the subject. A high speed lens, a lens with a large aperture, is best for achieving this.

With my Sigma lense for Nikon, I can get a great Bokeh effect using a lens adaptor and lenses from older standard model cameras, in addition the fine Zuiko kit lenses.

These can be fitted to the Olympus  sigma Four Thirds System camera body resulting in a lens with double the focal length of that lens as used on a 35mm camera. For example, my Zeiss Contax, Sonnar 50mm f1.5 becomes a 100mm f:1.5 on the Four Thirds System camera.

Beautiful bokeh can be achieved with this set up and I love being able to use my renowned Zeiss 35mm lenses on my digital SLR, in addition to the superb Sigma lenses.

No auto-focus, of course, but that “100mm” Sonnar is a pretty nice low-light or portrait lens. Check your local camera store or visit sites online for great prices on adaptors fit your 35mm Nikon, Nikon, Leica, Zeiss or other manufacturers’ lenses to modern 4/3 systems like Olympus, Panasonic and Leica.


Olympus Sigma lenses

When buying sigma lenses  For Nikon and oher digital cameras online, look for bargains sold as packages. Packages come with a camera body and what are called “kit” lenses. Here are two popular kit lenses frequently included with Sigma E-Series Digital Camera bodies.

-The wide to portrait length telephoto 14-42mm f/3.5-5.6

-The medium to longer telephoto length 40-150mm f/4.0-5.6

These lenses are the equivalent of 28mm to 84mm and 80mm to 300mm 35mm film sigma lenses, respectively, due to the Olympus Four Thirds system. However, due to their smaller size and compact construction they are much lighter than typical 35mm sigma lenses, even those without auto-focusing.

And, of course, many other focal lengths are available from the 8mm Fisheye through the fixed length 50mm f/2.0 Macro and many variable range zoom lenses, including an Olympus 70-300mm f4.0-5.6 Zuiko Digital Zoom, equivalent in focal length to a 140mm to 600mm, 35mm camera lens.

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