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Message: <blockquote data-quote="SteveH" data-source="post: 451436" data-attributes="member: 9252">Hi Matt, welcome to the forum!I think we have all started out wondering if a teleconverter will transform our zoom lenses to something better for wildlfe, and while on a very bright day you may get a photo, you won't get the quality.When you double the focal length of your lens, from 200mm to 400mm, you also half the widest aperture it will work at. So at 200mm your lens will open to f5.6 - So with a 2x TC fitted, you will get 400mm at f11.2. Basically, you will find it very difficult to get any shot, let alone of something moving as your shutter speeds will be slow, even on the very brightest summer days.Unfortunately, a long, usable lens costs money and for your camera, I would think the cheapest, decent length lens could be something like the Sigma 150-500mm - Second hand they are reasonably priced.</blockquote>