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Title: Canon 300mm f4
Review: Amazing piece of glass!!!!Bang on auto-focus, very effective image stabilization, minimal chromatic aberration and distortion and a fabulous smooth bokeh.Any lens at this price can't get any better.Initially I was confused between 400 f5.6 and 300 f4. But finally chose 300 f4. 400 f5.6 is cheaper and its autofocus is slightly faster but it lacks IS and its bokeh is inferior to that of 300f4.Mine usage was strictly limited to bird-photography, hence the choice. The sturdy build is worth loving, given the rough field usage it has to go through.Anybody beginning in bird photography should feel a quantum jump in the quality of his/her photographs after using this lens. For its nice price, it's also known as 'poor men's birding lens' in my bird-photographers circle ;-)I am planning to buy a 1.4X tele-converter soon. I wish canon also had 1.7X TC(like nikon); that would give me a reach of 500mm!Conclusively, this lens is a great value for money.
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