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The Sigma 500mm f/4 DG OS HSM Sports is a hyper-telephoto prime lens for full-frame DSLR cameras, and APS-C sensor cameras with an effective increase in the focal length. Designed for the professional sports and wildlife shooter, the Sigma 500mm f/4 DG OS HSM Sports features a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas of the image, an Optical Stabilizer system that compensates for up to 4 stops of shutter speed with an accelerometer for improved vertical and horizontal panning, an Hyper Sonic Motor for fast and quiet autofocusing, manual override (MO) which is activated by rotating the focus ring while using autofocus

Water and oil-repellent coating on the front element, a drop-in rear filter slot, a carbon fibre hood, and a dust and splash-proof construction. The Sigma 500mm F4 is available in Canon, Nikon and Sigma mounts, with the Nikon version featuring the new electromagnetic diaphragm. The Sigma 500mm f/4 DG OS HSM Sports lens is priced at £4999.99 / $5999.99 in the UK and the US, respectively. The Sigma 500mm f/4 DG OS HSM Sports lens is also fully compatible with Sigma’s

Global Vision teleconverters. It can be extended into a 700mm f/5.6 lens with the 1.4x teleconverter, or a 1000mm f/8 lens with the 2x teleconverter.

Weighing in at a whopping 3310g and measuring 38cm in length, the Sigma 500mm f/4 DG OS HSM Sports is an incredibly big and heavy lens indeed, although that does include the non-removable tripod collar.

Jack Daniel’s

Resource Magazine has just recently talked about the 25 tools to better show off your work online. So now, it is important to go out there and find the best blogs to follow, read and in some cases emulate. This does not mean one should plagiarize: rather, you should look at these blogs for inspiration and to see how one is properly managed. So here is the list, in no particular order, of eighteen great photography blogs that we think you should follow.

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