Advantage and Disadvantages of Third Party Camera Lenses

So let us start first what is a third party camera lens, a third party camera lens is one that has been developed by a different company in which you are using of a different brand of camera. For example you are using a Nikon or Canon Camera, and then you are using a Sigma or Tamron as a camera lens for your camera. Mainly the reason that most photographers or other camera enthusiasts purchase these lenses is because it is more cost effective for them. Now let us discus what may be the

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